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Discusses the relation of gravity to cosmology and to geophysics. Traces the history of ideas about gravity; discusses new instruments and new viewpoints on gravitation.
Traces the development of maps and of geodetic ideas from pre-scientific guesses to the present. Discusses the size, shape, and rotation of the earth and the position of the earth relative to its axis of rotation. Explains the use of the moon and artificial satellites as geodetic tools.
This older film is directed to young girls. Using diagrams, it helps them learn about menstruation and gives them a healthy understanding of the physical and emotional changes that occur in growing up.
A high school graduate contemplates what he will do now that he has finished high school. Students at the Columbus campus of IUPUI give testimonials about their experiences. Emphasizes the benefits of a small college community and the ease of transition to either Indiana University or Purdue University. For prospective students.
Continues the work on details begun in Sculpture V. Explains how an area can be broken up into planes by the use of a block of wood. Demonstrates ways of modeling the eyes. Discusses the importance of the sculptor being able to draw graphically. (KETC) Kinescope.
Dr. Koppelman discusses probability in genetics, referring to Mendel's findings on the subject. He compares what happens on the average versus what happens every time.
Uses animation to demonstrate the meaning of (a + b)² in a way intended to convey to students the idea that algebraic statements have concrete meaning and visual form.
Phillip Stapp, Tony Kraler, Nathan Sobel, International Film Foundation
Summary:
By means of animated lines, figures, and scenes, film illustrates through everyday happenings how "a line may be many things" and "a line is only an idea." Makes a plea for tolerance and a breaking down of all types of barriers between people.
A plea to eliminate the arbitrary boundary lines which divide people from each other. Presented in stylized animation.
Shows the preparation of both the Gooch crucible filter and regular paper filters. Indicates the advantages and disadvantages of the Gooch crucible. Pictures its preparation, Gooch filtering techniques, cleaning of the crucible, and the common problems associated with its use and suggested remedial measures. Presents a detailed picture of the use of the paper filter in this type of analysis from preparation to burning off paper from the filtrate.
Describes the basic articles for make-up and shows the correct method of its application. In this film the make-up for the two female roles in the play "Tom Sawyer" is done by one girl to show the extent to which make-up can create a character's appearance.
A travelogue-type film which shows some of the famous castles which gave Castille its name; includes the Alhambra, some historic monasteries, and the Gothic Cathedral of Burgos. With few exceptions, the vocabulary is restricted to the 2000 most common words and idioms from Hayward Keniston's A standard list of Spanish words and idioms. For second semester Spanish students.
Shows scenes in the Chicago Historical Society Museum which help give an understanding of the past by exhibiting possessions which touched the lives of some of those who have shaped United States history. Includes scenes from the homes of Paul Revere, George Washington, and Abraham Lincoln, as well as famous Philadelphia mansions and a variety of famous landmarks.
"Includes a report from Britain showing the RAF and the 8th Air Force on a hedgehopping bomber flight over France and Germany, and the 5th Air Force report from New Guinea." ("News and Notes," Educational Screen, June, 1944, 266.) Shows a film clip claiming to be an "Official German Newsreel," with footage of American planes that have been shot down and have crashed onto German soil. Shows how Germans salvage metal from these American aircraft to use for their own war effort and explains that each crashed plane is indicative of loss of soldiers' lives. Ends with a message from General Eisenhower asking the American people to support the Fifth War Loan Drive.
Explains the principles and demonstrates procedures and materials for joining and gluing wood, emphasizing the mortise-and-tenon and edge-to-edge joints. Shows procedures for application of glue and the use of clamping tools in gluing.
Presents two- and three-year-old children in their daily activities at a nursery school. Shows them imitating adults in their play, expressing hostility, responding to rhythm, learning to wash and dress themselves, eating, and taking an afternoon nap. Reveals how they learn about nature and life in the spring by discovering and examining living things. Points out that by the time they are four they become more social and begin to play in groups.
Follows the activities of two- and three-year-old children through the nursery-school day and through the seasons of the year. Shows ways in which teachers offer help, by setting limits and by giving support and encouragement; and indicates in playroom and playground scenes the variety and suitability of play equipment for natural and constructive activity.
Explains and illustrates the use of the Stanford-Binet test in the context of a school guidance program; indicates its accuracy of measurement; and how the results may be properly used. Gives the advantages and disadvantages of group and individual testing and emphasizes the basis of intelligence testing as a relative standing in relationship to standardized norms. The case of one child is followed, showing his classroom problems, the administration and scoring of his test, and the relating of his test scores to other data on him in a meeting of the various members of the school guidance staff, where a procedure is outlined for adjusting the curriculum and the individual to achieve educational and personal adjustment.
Introduces the instruments of the string quartet and indicates their similarities and differences. Presents selections in a variety of moods, including musical imitations of brasses, organ and harp. Features the Juilliard String Quartet. Includes musical selections by Ravel, Haydn, Casella, and Beethoven.
Headlines: Pacific Typhoon. Carrier "Enterprise" fights off Kamikazi attack during action off Kyoshu last May. Final Victory. Japan Surrenders. Atomic bombing of Nagasaki. War Heroes come home. The Proximity Fuse. Radar. Jet-Propelled Aircraft. Navy Day 1945.
Describes the complexity of transportation by relating the problem to the furnishings of a child's room; and illustrates the variety of trucks and trains that man has devised.
Demonstrates the removal of the mold from the clay bust. Shows methods and implements used in removing the cast. Points out the importance of being careful and patient. Reviews briefly what has taken place in the preceding programs. (KETC) Kinescope.
A story about a Mexican boy and his donkey is used in depicting the characteristics of rural life in Mexico and in emphasizing the importance of helping others. Educational collaborator, William G. Brink.
Portrays characteristic aspects of life in the valley of Western China, where habits and customs of past centuries exist side by side with such modern innovations as hydroelectric plants, telephones, and air transportation. Describes the age-old system of crop irrigation, the utilization of bamboo, and the fashioning of pottery, silver, and silk products.
Surveys the city of Amsterdam and the surrounding countryside. Shows typical sights and important buildings, residential areas, contrasting village scenes, and the shipping industry. | Surveys the city of Amsterdam and the surrounding countryside. Shows typical sights and important buildings, residential areas, contrasting village scenes, and the shipping industry.
Shows opencast mining, sluicing, and bucket dredging in tin mines in the Malay States; tin as it is shipped to the United States; and the processes of making tin plate, tin cans for food containers; and various tin-base alloys.
Describes Korea in 1948, when the U.S. Army was establishing a sound government there. Shows the Japanese being returned to Japan and the repatriation of Koreans. Sequences on education, health, the police system, and transportation emphasize the democratic influences.
When the United States subdued and began the occupation of Japan in 1945, it marked the first time in fifteen hundred years that the country has been defeated and occupied by a foreign power. The occupation caused enormous tension on both sides, and constituted the turning point in the U.S. – Japanese relations. The history of our relations with Japan, from Commodore Perry to the Present, is reviewed and analyzed by host Professor Gosling and Professor Ward. Among the questions they consider are: Will she turn toward communism? Film, graphics, and still photos illustrate the points under discussion.
This film, designed primarily for members of the medical, nursing and allied hospital professions, portrays an experiment in maternity care which is being conducted in the obstretical division of St. Mary's Hospital, Evansville, Indiana.
Portrays and explains, by means of animation, the role played by the Pacific Ocean in international affairs. Shows the growth of man's knowledge of the Pacific through the voyages of the early explorers and the later expansion of settlement in this area. Traces the settlement of Pacific island and coastal areas by British, Russians, Germans, French, Dutch, and Americans, and discusses the establishment of political control by these nations. Concludes with a review of Japan's efforts to control the Pacific.
Describes the organization structure of the Boy Scouts and how scouts move through the ranks, from starting as a Cub at age 9 to Rover at age 19. Emphasizes how the Boy Scouts of America provide constructive activities, give moral guidance, and cultivate desirable qualities in boys and young men, forming them into responsible and engaged citizens.
A companion-piece to Program No. 3, this program introduces two Japanese city families and explores their lives and ideas. A modern and very Westernized “new” family and a traditional “old” family show the contrasts of today’s Japan within the cities themselves. City life breeds a more rapid form of change than does life in the country. Industrialization, the increasing world markets for goods, greater communication with other parts of the world, and increasing exposure to other ways of life – all of these have worked to Westernize the city dweller. This program was shot for the series in Tokyo, and features comments by Professor Ronald Dore of the London School of Economics, who was in Tokyo at the time the program filmed. Professor Robert Ward appears as host.
Briefly explains the purpose of the United Nations Relief and Rehabilitation Administration (UNRRA) and shows President Roosevelt signing the agreement that led to its formation. Through scenes of war-ravaged Europe, families fleeing their homes and ruined cities, this film shows the necessity of UNRRA to provide food and medical supplies to countries in need. Focuses on the importance of relief work throughout Europe to build a stable post-war future.
A fantasy which shows the housewife that the farmer, the processor, the transporter, and the retailer must know "how much" and "how many" before they can make foods and other products available to the consumer.
Shows that play is an important activity for children and that it has common patterns at different ages. Considers play activities of children between the ages of five and twelve years and explains the part that parents can play in helping to encourage and guide play at each age level.
Immediately following Pearl Harbor, one of the critical problems facing the United States was what to do with the 100,000 people of Japanese descent living up and down the Pacific Coast. The immediate step was to remove all Japanese from critical areas around air fields, harbors, and industrial plants, to forestall sabotage and espionage. This mass migration accomplished by the Army working with the War Relocation Authority is shown in the film--from the first registration through the movement to temporary quarters established in race tracks and fair grounds to the final migration to settlements in Arizona, Colorado, Utah, and Wyoming.
"Stridently anti-Japanese film that attempts to convey an understanding of Japanese life and philosophy so that the U.S. may more readily defeat its enemy. Depicts the Japanese as "primitive, murderous and fanatical." With many images of 1930s and 1940s Japan, and a portentious [sic] and highly negative narration by Joseph C. Grew, former U.S. ambassador to Japan."--Internet Archive.
Discusses the possible inflation and unemployment to come after World War II as happened after World War I. Emphasizes rationing and thrift as weapons to combat inflation before it occurs.
This film shows people parachuting through the sky, and a helicopter flying about. The footage was possibly shot at the Grissom Air Force Base air show, year unknown.
Reveals the appearance, tonal qualities, and functions of various instruments of the woodwind choir--piccolos, flutes, clarinets, oboes, English horns, bassoons, and contrabassoons. Uses close-up photography to illustrate the techniques of playing these woodwinds. Includes excerpts from Brahms' First symphony, Beethoven's Turkish march, and Brahms' Fourth symphony.
Documents the series of 147 tornadoes which struck the South and Midwest sections of the United States in April 1974. Includes extensive footage of the tornadoes in Xenia and Cincinnati, Ohio and in Louisville, Kentucky. Shows how warning, advance preparation, and coordination in emergency operating centers helped to save many lives.
Footage of various student activity around campus at Indiana University - Bloomington during the fall season. Includes aerial shots. This footage may have been shot with the intention of using it for promotional purposes.
Shows daily tasks of a rural family of southern Spain. Depicts a trip by a boy and his father to a city market place; shows representative aspects of Spanish life; and emphasizes the activities of the children.
Takes Leni Riefenstahl's footage from the Nuremberg speeches of the Nazi Leaders and superimposes English "translations" over a set of orations in English "in which Hitler, Goebbels, Göring, Streicher and Hess report their sins and mistakes as frankly as if they were victims of one of those notorious 'confession drugs'." (Documentary News Letter, March 1943, 195).
Uses regular photography and animation to present the physical characteristics, the people, and the natural resources of Norway, Sweden, and Denmark. Follows the activities of two men--John Bergesen, farmer and first officer of the freighter Arcturus, and Olaf Thorson, a typical industrial worker of Gothenburg, Sweden.
Traces the career of John Glenn, first U.S. astronaut, from his school days in New Concord, Ohio, to his speech to the U.S. Congress after his orbital flight. Pictures Glenn as a typical, but highly successful, American boy. Interviews many people in his town who speak well of him and follows his career in the armed forces. Shows preparations for the space flight, the blast off, Glenn in flight, the return from orbit, the parades, and the appearance before Congress.
Uses scenes from Japanese narrative scrolls of the 12th, 13th, and 14th centuries to tell the story of an innocent man, unjustly accused of a capital crime, who wins his vindication. The spoken text is derived from authentic sources, and original music provides the backgrounds.
Shows many of the kitchen appliances of tomorrow. Takes the viewer inside the experimental laboratories of General Motors to see such advanced aids to cooking as an automatic recipe viewer, heatless oven, automatic servers, and new designs in cabinets. Through animation, gives a short glimpse of some seemingly improbably but beneficial inventions not yet perfected.
Roscoe Drummond, Washington columnist for the New York Herald Tribune, interviews a subject expert and two opinion representatives regarding slum clearance and housing. Estimates that it will cost America $100 billion to clear our nation of slums and stop the deterioration of our cities. Presents arguments for the participation of the federal government in solving this crisis because of the tremendous cost of slum clearance as well as arguments for the participation of private enterprise with the support of local citizens and governments. (T.W. Wilson Associates) Film.
Surveys the natural resources of Washington and Oregon, which are shown to depend upon the water supply, which in turn depends on lumbering and forestry management. Two boys from a conservation club observe many steps in the reforestation process and various phases of lumbering and the manufacture of wood products.
Compares the Columbia, Colorado, and Sacramento-San Joaquin river systems to show what man has done to utilize each to his advantage. Illustrates the adaptation of the rivers to diverse uses--as avenues of commerce, for logging and fishing, for electrical power, and water.
Shows the actual excavation of pre-Columbian sculpture at Veracruz, Mexico, by a National Geographic Society-Smithsonian Institution expedition. Emphasizes the discovery of the largest deposit of jade ever found.
Discusses and demonstrates both undesirable and desirable pre-camera or rehearsal procedures from the director's point of view. Traces the development of a program from its inception to camera time. Features Alan Beaumont.
Tells the life story of bats. Shows live bats and pictures a bat's voice of and oscillograph. Explains how bats navigate by echolocation or sonar. (WGBH-TV) Kinescope.
There are many partnerships in nature where two plants may help each other, or a plant and animal may mutually benefit one another, or where two animals may contribute to each other’s welfare. You will see on this program an example of each. The lichen, a common plant, looks like one individual, but really consists of two kinds of plants living together. You will see this story through the microscope. And you will see the story of cross-pollination, in which bees and insects take nectar from the flowers and in so doing transfer pollen from one flower to another. Ever look inside a wood eating termite? You will and with a microscope to see a story of mutual benefit. Inside the termite lives a host of one-celled animals which assist the termite in digesting the cellulose in the wood he consumes. (WGBH-TV) Kinescope.
Wind, heat, cold, and rain combine to weather the rocks and break them down. But the face of our earth is molded and the decayed rock carried away from one place and deposited in another mainly by water. The deposits laid down by water, wind, or ice produce after long periods of time and under pressure, rocks which are classed as sedimentary. You will see and learn how to distinguish some of the common sedimentary rocks; limestone, sandstone, shale, and conglomerate. Each of these sedimentary rocks is formed in a different way; limestone by chemical precipitations, sandstone by grains of sand cemented together, shale from beds of mud or clay pressed and cemented into thin layers, and conglomerate is made of gravel or pebbles of assorted sizes cemented together. You will be introduced to one of the most interesting features of sedimentary rocks -their fossils. These records of living things are guides to the history of life on the earth.
What happens when a rocket ship in space is struck and damaged by a meteor? Capt. Gell, a Navy expert on crew equipment, demonstrates the Navy’s full-pressure space suit for emergency escape from a shattered craft. Dr. Haber, an aerodynamic engineer who has made a thorough study of the theoretical problems of escape and survival far out in pace, explains the difficulty of making an individual descent into the atmosphere, on one hand, and of rescuing the stranded flyer in space, on the other. Dr. Herbert’s recommendation: the crew should ride the damaged vehicle back to earth --if anything remains of it.
United States. Office of War Information. Domestic Branch. Bureau of Motion Pictures
Summary:
"A quick overview of the weeks spent in learning to jump, tumble, and fall, in practice jumping from a tower and from a dummy plane, in packing the parachute one's life depends on, in learning to jump from a plane in half a second, to guide a chute by working the shroud cords, to land without splintering a leg, to disengage the chute and come up fighting."--War Films, Bulletin of the Extension Division, Indiana University, February, 1943.
Illustrates the eight parts of speech and their importance in communicating ideas. Derives examples of parts of speech from a beach scene, showing youngsters of different ages enjoying various activities. Utilizes overprint titles and split-screen techniques. The split-screen device simultaneously shows a beach scene and a grammatical construction related to it, which is discussed and explained.
Portrays to youth the wide variety of career opportunities in sales and merchandising occupations, how entry jobs fit into the career ladder, work settings, levels of occupations, and information about preparatory experience available through part-time work or a summer job in the retailing industry.
Stresses the importance of appearance to a speaker's self-confidence and good audience reaction. Uses cartoon characters to show types of poor posture. A man preparing his first speech demonstrates balance and proper techniques of posture and movement. Reviews the suggestions made.
Introduces the principal amendments to the Constitution by showing in dramatic form what would happen if the Bill of Rights disappeared from the American scene. | Introduces the principal amendments to the Constitution by showing in dramatic form what would happen if the Bill of Rights disappeared from the American scene.
Shows visits to the homes of two Caucasian families who adopted children of Negro and mixed parentage, in which their hopes and problems are discussed.
Portrays the life of the Eskimos living in northeastern Canada, whose lives have been only slightly touched by civilization with emphasis on the technique and meaning in their stones sculptures. Describes a typical Eskimo family of this region; indicates their dependence on sea animals; and relates a number of the myths found in Eskimo culture. Carvings, made by the men during the long nights of winter, depict personalities from the myths and things from the Eskimos' world. Eskimos' summer tent and winter snow houses, a seal hunt, the festivities associated with a boy's first seal kill, and traditional dances and recreational activities are all surveyed.
Traces the activities of a junior-high school boy in preparing a class report. Stresses the following steps: choosing the subject, thinking of one's interest and audience, gathering information and organizing the presentation.
The unit of life –the cell: history of the concept; validity of the concept; variations of size, form and function; limitations of a cell; details of structure and function; special features of plant cells, nuclear control of cellular activity, particularly reproduction (mitosis)
Points out character traits that are important to look for when evaluating a marriage partner. Stresses the importance of self-analysis, the possibility of making certain changes in oneself and fewer demands on other people, and accepting in a marriage partner those basic attributes which cannot be changed.
No longer wanted by their masters, a donkey, dog, cat, and rooster set out for Bremen to become musicians. They prove clever enough to outwit some robbers.
Uses animation to describe the economic principles underlying our private, competitive economy. Identifies the major forces that threaten its efficient operation and shows the close interrelationship between the freedoms enjoyed by the citizen and the continued functioning of a free economic system.
Short promotional video highlighting the various attributes of IU Libraries Moving Image Archive (IULMIA). To learn more about IULMIA, check out our website: https://libraries.indiana.edu/moving-image-archive
The plot focuses on a murderer whose increasing guilt leads him to believe he can hear his victim's heart still beating beneath the floorboards where he buried him. Seen through the eyes of the nameless narrator, the surrealistic images in the film help convey his descent into madness.
Teaching Film Custodians abridged classroom version of a Cavalcade of America television series episode, "The Gift of Dr. Minot" (season 3, episode 20), which originally aired on April 12th, 1955 on ABC-TV. This film re-enacts the research of Boston physician and Nobel Prize winner Dr. George Minot, who disregarded his own diabetic condition to develop a cure for pernicious anemia in 1922. Concurrently, Canadian Dr. Frederick Banting (also a Nobel Prize winner) perfected insulin as a cure for diabetes, enabling Minot to conclude his experiment.
Dramatized incidents including a discussion between a disgruntled son and his parents over the boy's plans for a college education are used in explaining that discussion brings information to the individual, leads to a broader and richer life, and expedites cooperative achievement.
Illustrates and explains the use of role playing in analyzing problems of human relationships. Shows a mothers' club and a group at the 1947 National Training Laboratory in Group Development as they enact simple incidents involving various techniques of role playing.
Evolution of inherited patterns: adaptation; the means of evolution –mutation and recombination; retention of variability; results of evolution –specific selected examples such as drug resistance, melanism, mimicry; ecological aspects.
Vice-President Henry A. Wallace narrates a patriotic, propaganda short designed to boost morale in the the early days of World War II. This film was nominated for an Academy Award for Best Documentary Feature in 1943.
Illustrates and explains the chief properties of the important quadrilaterals such as the parallelogram, rectangle, rhombus, square, trapezoid, and trapezium.
Examines four different approaches to working with clay and ceramics. Shows scenes of ceramists at work to illustrate that the current approach to ceramics is characterized by change and creativity, allowing the ceramist to create pieces that are traditional and functional or purely artistic. Notes that the stimulus for shaping clay upon the wheel or molding clay with slabs can come from the artist's environment or his imagination. Explains that designs applied to ceramic pieces prior to firing can alter their basic forms and that experimenting with the ingredients in glazes and methods of glaze application allow for varying results.
Discusses and illustrates the size, shape, composition, and organization of a living cell, and, with the use of a model and a simplified drawing, shows the different parts. Points out a few of the differences between a plant and an animal cell. (KUHT) Film.
All organisms tend to maintain their organization in spite of changing environmental conditions. Dr. Roney describes the different types of responses which organisms make to stimuli. Using the micro-projector, he shows a number of simple organism responses. He also shows the beating heart muscle in a live chick embryo.
This film outlines the convalescent training program for hospitalized U.S. airmen in World War II. It is designed to acquaint the convalescent with the program in which he will take part. Patients are shown in their beds, doing light calisthenics in the wards, exercising specific muscles using specially designed equipment, exercising and playing games out-of-doors, and engaging in hobbies and crafts. Other aspects of the program involve convalescents sharing wartime experiences with their fellow patients, teaching them new material and new skills, brushing up on their old skills acquired on duty, taking courses, and even earning degrees. The program also includes updates and discussions on the war, watching duty-related films, and engaging in purely social activities. The circulation and blood supply to various parts of the body are shown in animation.
United States Navy, Bureau of Aeronautics, United States Navy, Division of Personnel Supervision and Management
Summary:
U.S. Navy training film intended to improve dictation technique through humorous demonstration of common faults. After a series of vignettes where inept and ineffective styles of dictation to a stenographer are dramatized, a model businessman demonstrates a well prepared and organized method of dictating letters. The demonstration includes detailed instruction in the use of Dictaphone and Ediphone cylinder recording machines.
Using maps and animated diagrams, the importance of the Middle East in the world strategy of the Allied nations during World War II is shown. Austere images and narration inform the viewer of the strategic issues at stake: control of oil production, the region's role as a wall obstructing supply lines between Japan and Europe, the distance Allied supplies must travel to reach Egypt, Palestine, Iraq and Iran. Narration states "The Middle East stands between our enemies. While we hold it our enemies cannot win, and it will become a vital instrument in their defeat."
Describes the vast telephone network, equipment and personnel involved in the completion of a long distance call. Shows how telephone lines and cables run all over the United States, through deserts and underneath mountains. Telephone employees can be found in similarly diverse places, laying cable, restoring service, conducting experiments and delivering supplies. The plan to make service available to everyone splits the country into eight regions with regional centers in Chicago, New York, Atlanta, St. Louis, Dallas, Denver, San Francisco and Los Angeles. An animated map demonstrates how each regional center is linked to each of the others with a direct line and then to scores of other cities. Coordination and efficiency are required to get each call through. Dramatizes the longest call possible in the continental United States, from Eastport, Maine to Bay, California, and the connections the call goes through.
Presents a 1948 report on the School Camp experiment authorized by the Board of Education of the City of New York and conducted in cooperation with Life Camps, Inc. Shows numerous examples of children enjoying a variety of camping experiences. Stresses the importance of the children's interactions with each other and with nature.
Presents a number of family situations to show that behavior of a child depends on his age and how the development of an individual's personality is affected by many family factors. Portrays examples of children as their behavior is influenced by such factors as the age of the child, illness of a parent, proximity of ages between children, native differences, and attitude of grandparents.
"The story of the Lancaster airplane, the first large bomber built in Canada. Shown are the workers involved in its construction, and the crew who ferried it overseas, as well as the combat crew who took it on its first flight over Berlin."--National Film Board of Canada website.
A story of land economy and one man, Bill Bailey of Clarksville, Tennessee, through whose foresight and untiring effort the Four Pillars of Income were established in Montgomery County, Tennessee (adapted from the Reader's Digest story of the same name by J. P. McEvoy).
Presents in detail step-by-step techniques used in gravimetric analysis and the preparation and use of both the Gooch crucible filter and regular filter paper in this type of chemical analysis. Part I gives an overview of the operation in determining the chloride concentration in a silver chloride sample. Shows in detail the weighing of the sample, dissolution, precipitation, filtration, drying, and weighing of precipitate.
