14062. The micrometer (15:19)

Date:
1941
Summary:
Shows various types of micrometers; how to use a micrometer, read the barrel and thimble scales, check the accuracy of readings, and take care of the instrument.

14063. The middle months of pregnancy (29:09)

Date:
unknown/unknown
Summary:
Discusses such topics as superstitions about birth marks and deformities, how to relieve morning sickness, changes in clothing, and how to relax and rest. Contains suggestions for relieving constipation, shortness of breath, and dizziness as they effect the expectant mother.

14064. The middle states (10:57)

Date:
1942
Main contributors:
Erpi Classroom Films, Inc., Howard W. Odum
Summary:
Presents an overview of man's use of resources in the states of Minnesota, Iowa, Missouri, Illinois, Wisconsin, Michigan, Indiana, and Ohio. Domestic and European migration and population trends of the region are indicated by animated drawings. Agricultural and industrial projects in each section are portrayed and relationships are noted with particular reference to other regions of America. An instructional sound film.

14066. The milling machine (07:30)

Date:
1941
Summary:
Indicates the basic principle of the standard plain milling machine. Each part of the machine is named and explained, and some elementary setups are demonstrated.

14067. The Minerals of Life (29:31)

Date:
1960
Summary:
In addition to organic elements, living beings are necessarily composed also of inorganic elements such as calcium, iron and cooper. This program analyzes the ways in which these inorganic substances behave, and what their function is in maintaining life. Bulk elements, including calcium, sodium and phosphorous salts, serve as structural materials to build bones, link cells, and activate nerves. Trace elements, existing in minute quantities throughout the system, include the iron, cooper, nickel and zinc which are found in the blood, or in the chlorophyll of green plants. Experiments and demonstrations of the ways in which minerals behave in living things form part of the program.

14068. The missing city gates (29:54)

Date:
1957
Summary:
Reports on excavations concluded at Nimrud, Iraq. Emphasizes the bronze gates, now in the British Museum, that were originally located in Balavat, near Nimrud. Points out that recent discoveries have shed light on various facets of ancient Assyrian civilization. (NYU) Kinescope.

14069. The missing elements (29:20)

Date:
1956
Summary:
Discusses the discovery of three elements predicted by Mendeleev. Demonstrates and explains the use of the spectroscope and of other methods in isolating elements. Revises Mendeleev's Periodic Table by adding the three new elements and rare gases. (KQED) Film.

14070. The Molding and Nature of the Shore (29:24)

Date:
1959
Summary:
Shows a variety of beaches and headlands, their contours, and evidence of a continuing interaction between land and water. Uses film sequences, photographs and demonstrations to illustrate the causes and effects of currents, waves, and tides. Explains their part in building up and destroying the shoreline. Tells how living organisms also protect and build up the land and at the same time help destroy it. Points out the destructive work of the rock-boring clams, urchins, and the contributions of kelp, other algae, and the tube worms in building up the beach area. Concludes with film clips of the octopus.