Educational film guide ()

541.37-548 EDUCATIONAL FILM GUIDE COLLOI DS — <:!ontinued llQuld). Failure to settle is explained by Brownian movements, protective films, and chargres on particles. The Cottrell process of smoke precipitation concludes the presentation 54 1 .37 Electrochemistry ELECTROCHEMISTRY, EBF 1937 llmin sd (Chemistry ser) $45, rent $2.50 541.37 Jh-sh-c Guide Collaborators: Hermann I. Schlessinger and Warren C. Johnson, University of Chicago The abstract concepts of electrochemistry are made clear by cinematic techniques. The electrolytic decomposition of hydrogen chloride is followed by the production of electric current from the action of chlorine and hydrogen on platinum. An explanation of the storage battery Integrates both processes. Electroplating illustrates participation of electrodes; electrorefining illustrates preferential discharge; and electrolysis of sodium chloride to yield caustic soda illustrates participation of the solvent. The production of aluminum from a molten electrolyte concludes the subject 542 Experimental chemistry OXIDATION AND REDUCTION. EBF 1932 llmin sd (Chemistry ser) $45, rent $2.50 542 Jh-sh-c Guide By Dr Hermann I. Schlessinger and D. Harvey B. Lemon of the University of Chicago The simultaneous process of oxidation and reduction is presented first by burning phosphorus and rusting iron under experimental conditions. Mercury rust is then decomposed to discover the component of air responsible for oxidation. Other examples of oxidation and oxidizing agents follow. The process of reduction is presented in the operation of the blast furnace, magnesium burning in dry ice, and thermite welding. Everyday examples of oxidation and reduction conclude the picture 546 Inorganic chemistry CARBON AND ITS COMPOUNDS. Coronet 1949 lOmin sd $45; also color $90 546 sh-c-tr-ad Guide Collaborator: Therald Moeller, associate professor of chemistry, University of Illinois A diamond ... a pencil . . . and a chunk of charcoal. Beginning with these familiar objects, this film explains carbon's simple compounds and introduces hydrocarbons and the more complex chain and ring compounds. It teaches appreciation and understanding of the tremendous importance of carbon in our domestic and industrial worlds THE HALOGENS. Coronet 1947 lOmin sd $45; also color $90 546 jh-sh-c Guide Collaborator: Dr Therald Moeller, University of Illinois Combines laboratory demonstration and lecture techniques to present the members of this important group and their properties, free and in tlieir compounds OXYGEN. Coronet 1947 lOmin sd $45; also color $90 546 Jh-sh-c-ad Guide Collaborator: Dr Therald Moeller, University of Illinois Introduces students to this Important element thru dramatic experiments. The need for oxygen in the support of life and in combustion and the part oxygen plays in electrolysis and in oxidation reactions are shown ROMANCE OF RADIUM. TFC lOmin sd (Pete Smith specialties) apply 546 Jh-sh-c Produced by Metro-Goldwyn-Mayer "This is the story of the discovery of radium. . . Highly recommended for college courses in public health. Recommended for general science courses, grrades 6 through high school. The achievement of Mme. Curie might interest girls' vocational groups. The commentary tends to overemphasize the curative powers of radium." Advisory committee 543 Chemical analysis FLUE GAS ANALYSIS (ORSAT APPARATUS). Castle 1945 19min sd $30.74 543 sh-tr-ad Guide Produced by the U.S. Office of Education Setting up the Orsat gas analyzer; drawing in an air-free sample of flue gas; absorbing and measuring the amounts of carbon dioxide, oxygen, and carbon monoxide In the sample; and how to calculate the amount of nitrogen PROPERTIES OF WATER. Coronet 1941 ♦ lOmin sd $45; also color $90 543 Jh-sh-c-tr Guide Collaborators: E. C. Waggoner, Illinois state Audio-Visual Dept. and Gilbert I. Renner, Elgin (Illinois) Public Schools Shows some of the chemical and physical properties of water by means of experiments and demonstrations. Composition of water is shown by electrolysis. Boiling under various firessures is shown. Solubility of solids, iquids and gases in water is demonstrated by several experiments. Saturated solutions, crystallization and super-saturation are also demonstrated. Energy changes of water to ice and to steam are shown; also water as a standard of weight and heat and volume "An excellent film for use in general science and chemistry classes at the junior high, senior high and college levels. Content is accurate, organization is good, and the various experiments are clearly pictured. Photography and sound are well above the average. '• Don White in Ed. screen 548 Crystallography CRYSTAL CLEAR. AT&T 1948 lOmin sd color loan 543 Jh-sh-c-tr-ad Tells the story of man made crystals which are so vital in the telephone industry. The narrator relates that nature takes thousands of years to grow the rare type of quartz needed for electronic crystals; but now they can be made in a short time by special processes. The growtli of the crystals is shown step by step, beginning with the seeds to final large crystal clear bars CRYSTAL GAZERS. GE 1946 lOmin sd (Excursions in science no. 7) loan 548 Jh-sh-ad This film is a presentation of crystals, their characteristics, and some of their uses, and shows how crystal structure can be used in identifying materials CRYSTALLIZATION. Bray 20min si $45, rent $2 548 Jh-sh-c-ad Part one reveals by means of the microscope the artistry of nature's creation of crystals in the form of icicles and snow flakes. Many of nature's imperishable crystals are also shown, such as quartz, amethyst, and salt, and some from the metals Part two shows by experiments under the microscope how crystals are formed, their peculiarities of growth, and determining factors in shape 382