Educational film catalog (1936)

EDUCATIONAL FILM CATALOG 578-582.13 578 Microscopy Unseen worlds. lOmin 16-sd-loan 35-sd-nf- * loan 1941 Ganz 578 ALSO AVAILABLE FROM 16mm: Col Geo loS Kan NH POW SC Tenn Describes the RCA electron microscope. Opens with shots depicting Anthony Leeuwenhoek and Louis Pasteur using microscopes. Explains difference between light and electron microscopes. Explains the development of the electron micro- scope as a logical result of research in television and facsimile. Shows and explains the various steps involved in preparing a specimen and the operation of the microscope, and the mak- ing of micrographs (electron photographs) using the instrument. The film closes with some suggestions on the various applications of this new and powerful instrument to the problems of research in medicine, industry and government "Explains the intricacies of the newly developed electron microscope. With this new instrument in use the common micro- scope loses part of its importance in that the electron microscope has so much greater magnifying powers. The film ex- plains the new instrument in an amazingly clear way, making it a valuable teaching aid in almost all classes of science. Highly recommended for biology, chemistry and physics." Tennessee sh-c-adult 580 Botany Wizards of Svalof. 14min 16-sd-loan 35- sd-nf-loan 1941 U.S. agric. 580 ALSO AVAILABLE FROM 16mm: Ariz Col Ind loS Kan NH SC Tenn Wis The 16mm print may be purchased for $6.39 and the 35mm for $19.15 On genetics, principally of wheat. The film shows scientists of the Swedish seed union at Svalof at work and illustrates changes in plant improvement by selection, scientific crossing, exposure of seeds to X-rays, and chemical treatment of seeds to double chromosomes "An interesting filni, produced in Swe- den with English commentary." Iowa State "The first film we've seen showing the really practical side of the work in the laboratory. One of the best." Robert A. Sencer sh-c-trade-adult 581 Physiologic botany Cellulose decomposition in nature. 30min 16-si-$50; rent $4 1941 Rutgers 581 Natural decomposition due to the ac- tivities of organisms, both plant and ani- mal is shown in this film. Many forms of life which break down cellulose and return its constituents to the soil. The destructive work of bacteria, fungi and protozoans is illustrated by pictures taken in the woods, and by gross and micro- scopic studies in the laboratory. Several animals whose digestive tracts harbor cellulose decomposing organisms are used to demonstrate this method of destruction. Reviews the parts played by a wide variety of organisms in the cellu- lose cycle. Technical How plants grow. IR 16-sd-$35; rent $1.50 1939 DeVry 581 "This study is really two short reels, 'Seed Dispersal' and time lapse studies of root growth of the 'Bean.' Excellent ma- terial for Biology classes and general Na- ture Study classes." Producer jh-sh Guide Movements of some common plants. 15min 16-si-$25; rent $2 1940 Rutgers 581 ALSO AVAILABLE FROM 16mm: Ohio The growth of the following plants is here speeded up enormously: trillium, wild carrot, garden pea, mushroom, scarlet bean, cucumber, blood root, night-bloom- ing cereua and marsh mallow Pollination. 8j4min 16-si-sd-apply 35-si- sd-f-apply 1937 VL 581 ALSO AVAILABLE FROM 16m,m,: Ohio "The film opens with an examination of the essential parts of the ilower. After a passing reference to the wind pollination of the wild geranium the characteristics of insect-pollinated flowers and devices fa- vouring cross-pollination are shown in the Poppy, Schizanthus, Broom, Meadow Sage and Cornflower. The germination of pollen griiji:s in a sugar solution is shown by sptuded up photography, and the growth of the pollen tubes and the penetration of the ovule is explained by animated diagrams. This film is by no means a complete ex- position of the subject. . . The photogra- phy is excellent throughout, including the speeded-up shots. . . There is little con- tinuity in the film, which consists mainly of a number of isolated and disconnected examples of pollination by bees. . . As a revision film for children of 14-}-, though more suitable as a general interest film." British film inst. sh Guide Seed dispersal. 4R 16-si-sd-apply 35-si- sd-f-apply 1939 VL 581 ALSO AVAILABLE FROM 16m,m: Ohio Part I: Wind dispersal; Part 2: Animal dispersal; Part 3: Exploding fruits; Part 4: Seed burial el-Jh Guide 582 Trees California giants. llmin 16-sd-rent $2 * Films, inc. 582 ALSO AVAILABLE FROM 16mm: Cal SAd Produced by Paramount The story of the great redwood or sequoia trees of California. Recommended for courses in physical geography Jh-sh-c-adult 582.13 Flowers Dandelion. IR 16-si-sd-apply 35-si-sd-f- apply VL 582.13. ALSO AVAILABLE FROM 16mm,: Ohio "A study of the Dandelion as a typicai example of the group Composltae, including the processes of cross and self pollination, fertilisation and germination. Speeded-up sequences show the growth of the young seedling and the persistence of the plant in recovery from damage to both roots and stem." Producer Guide ti - silent: td - sound; f - inflammable; nf • safety; p - primary; el - elementary; jh - junior high; sh - senior high; c - college; trade - trade schools 69