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Discusses the Louisiana Purchase and the westward movement which resulted from it. Reviews the role of men such as Lewis and Clark, Pike, Long, and others in the exploratory process. (KETC) Kinescope.
Discusses Garrod's work on inborn errors in the metabolism of alcapton and melanin. Shows how chemical pathways in metabolism can be worked out using genetic defects as tools. Discusses the metabolic diseases phenylketonuria and galactosemia and points out that medical treatment causes the retention, and therefore the build-up of defective genes in the population. Presents the one geneone enzyme hypothesis and describes the procedure for testing the hypothesis in question with mutants of Neurospora requiring Vitamin B1 (thiamin). Lecture given by Dr. G. W. Beadle.
Shows that birds that eat seeds have strong bills. Includes shots of the canary, evening grosbeak, junco, indigo bunting, goldfinch, white-crowned sparrow, song sparrow, cardinal, cross bill, and cedar waxwing.
Shows how to set up rotary shears, make test cuts, and operate the shears; and how to set up high-speed shears, make test cuts, and operate the shears.
Surveys the development of blood transfusion in international medical history from Landsteiner's discovery of the four blood groups in 1901. Shows the setting up of various blood donor and blood bank systems in England and the United States. | Surveys the development of blood transfusion in international medical history from Landsteiner's discovery of the four blood groups in 1901. Shows the setting up of various blood donor and blood bank systems in England and the United States.
Shows everyday applications of bookkeeping to increase motivation for its study, to help the student decide whether he is interested in taking bookkeeping, and to help in vocational guidance. Gives job information and information about educational preparation for a variety of kinds of work.
Shows how to mount the workpiece on the milling machine table; how to use a wiggler to position the workpiece for drilling; how to mount the cutting tools in the spindle; how to bore the hole to close tolerances; how to prevent bellmouth when boring a hole; how to distance from a previously drilled hole; and how to use plug gages and a micrometer to check the center distance between the holes.
Shows how intelligent probation can change a boy's attitude and conduct. In company with his gang, Johnny steals a car, which is wrecked during the excitement of their get-away. What might have happened to the boy is realistically portrayed in a sequence of vivid police and prison scenes. What actually happens to him in a good juvenile court with well-organized probation service provides a stirring contrast. A plea for youth and justice.
Shows, through the interest of a boy and girl in birdhouses, the construction of different types of houses for different birds. Tells what materials to choose and how they can be used most effectively. Shows children putting up houses in the early spring, and pictures the bluebird, martin, tree swallow, and house wren in houses constructed for them.