841. Water : sculptor of the land (29:25)

Date:
1958
Summary:
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.

843. Waves across the Pacific (31:37)

Date:
1966
Summary:
A film record of the expedition led by Dr. Walter Munk of the Scripps Oceanographic Institute which tracked a family of ocean waves from their birth in the turbulent waters of the Antarctic to their death on a peaceful Alaskan shore.

845. Welcome soldier! (14:35)

Date:
1944
Main contributors:
McInnes, Graham, 1912-1970
Summary:
Presents two films. Welcome soldier! outlines the various government plans created to help Canadian World War II veterans return to civilian life in the workplace and at home. In the companion film, John Buckley, the labour representative on the Ontario Social Security and Rehabilitation Committee, chairs a discussion among service men and women on the difficulties faced by veterans returning to the work force.

846. Western front (20:22)

Date:
1942
Main contributors:
Wilding Picture Productions
Summary:
Begins with a short summary of American attitudes to the War in Europe and how the U.S. underestimated the militaristic tendencies of the Japanese. Argues that the Chinese have been fighting World War II longer than any other allied nation and should be considered one of America's chief allies. Describes America's effort to supply allied nations in the Pacific with war materials. The desperate need of the Chinese people is stressed. Scenes include the carrying of supplies over the Burma Road and the bombing of Chinese cities.

847. Wet-Mounting Pictorial Materials (11:43)

Date:
1954
Main contributors:
Indiana U Audio-Visual Center
Summary:
[motion picture] Explains the advantages of wet mounting paper materials on cloth, and then demonstrates the wet-mounting process in detail. Also shows methods of displaying wet-mounted posters, charts, and maps.

848. Wetlands (10:39)

Date:
1944
Main contributors:
United States. Department of Agriculture. Soil Conservation Service
Summary:
A USDA production conveying the department's policy recommendations for the development of unusable wetlands into productive agricultural land. Narration explains that, for much of the year, land with "too much water with nowhere to go" is rendered unsuitable for farming. Engineering the draining of 31 million acres for the creation of productive agricultural land represents "one of the last great frontiers of America." Various drainage techniques are explained in detail: ditches, tile systems, and the creation of mole channels. "Shows where our 120 million acres of wet land are located. Points out that 78 million of these acres will serve us best if left in their natural state for the production of timber and the preservation of wildlife. Thirty-one million acres are shown to be suited to farming if properly drained. A section of the film illustrates briefly the principal types of water control and methods of land drainage. Through the use of these methods, farmers, working together, can improve drainage on land now being farmed, and bring into production land that is now too wet for any production at all. Recommended audiences: Farmers in Atlantic Seaboard and Gulf States; Ohio, Mississippi, and Missouri Valleys" (Motion Pictures of the United States Department of Agriculture, 1945, 46).

849. Whales and whalermen (21:54)

Date:
1957
Summary:
Depicts a whale hunt in the Indian Ocean off the coast of South Africa. Shows life on board the whaler and events preparatory to the finding and killing of these mammals. Explains that whaling is an important industry centered at the port of Durban in South Africa.

850. What to do in a gas attack (15:03)

Date:
1943
Main contributors:
Price, Sherman
Summary:
Explains what war gas is, how it is used by the enemy, and how simple household items, such as bicarbonate of soda and bleaching solution, may be used to prevent casualties.