22. Fun on the playground (11:12)

Date:
1947
Summary:
Shows a group of children playing three types of games: those which they invent themselves, those learned under supervision but carried on alone, and those dramatic activities which grow out of school activities.

23. Animals in sub-gravity conditions (14:56)

Date:
1957
Summary:
Surveys the problem of human survival in space. Pictures the firing of an Aerobee containing two monkeys and two mice. Shows the reaction of mice to the reduction of gravity pull as the missile leaves the surface of the Earth. Points out that tests show no reason why man cannot fly 37 miles into the atmosphere. (New Mexico College of A.& M.A.) Film.

24. Digestive systems in animals (14:50)

Date:
1971
Summary:
Shows the variety of ways animals obtain food and their different types of digestive cavities--fully closed, one opening, and two openings. Examines digestive organs in an earthworm, grasshopper, frog, cat, and bird. Looks at peristalsis in a dog's stomach and the action of the villi in a pigeon's small intestine.