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Two boys, both between the ages of four and five, are subjects in a study of aggressive and destructive impulses. The film shows how differently two children, but a few months apart in age and from similar backgrounds, respond to a graduated series of opportunities and invitations to break balloons. Demonstration film of a projective technique developed by L. Joseph Stone.
Modern community hygiene controls are presented. How the death rate from communicable diseases has been reduced through scientific advances and social controls. The effective functioning of a public health department.
Technique of drilling and tapping blind holes in cast steel on a radial drill. A drill jig with loose bushings is used for locating the holes. Setting up the work on the table of the machine, setting the jig on the piece to the layout lines. Calculating the size of the tap drill and the method used when setting the machine to drill a number of holes to the same depth. A wizard drill chuck is used in the drilling operation, and a standard friction chuck for holding the tap. The action of a tap in a hole is shown in animation and the reason why a tap binds in the hole and must be reversed frequently when tapping in tough metals.
The scene is Virginia, 1765, just after the King's tax proclamation has been read and the legislature is in an uproar. Ensuing events lead to a protest meeting held by patriots at Richmond, at which Patrick Henry delivers his "Give me liberty" speech.
Focuses on the conservation of important natural elements such as rubber, oil and metal needed to support the U.S. Victory Program. Viewers are shown various ways in which they can change daily habits to get the most out of these materials.
Portrays representative aspects of Louisiana and its key city, New Orleans, during the years of Creole dominance. Shows Mississippi River packet boats, delta country, cotton and cane plantations, slavery, education, religion, architecture, music, the code duello, Creole customs, manners, and attitudes, and the prevalence of French speech.
Examines what has happened in Europe to check the threat of a menancing population growth. Traces the growth of population in Europe from the Middle Ages and suggests that the small-family concept, which began in England in the late nineteenth century, has had more effect on population than any other thing.