Narrated feature about scientific advances made possible by the microscope. Light passes through a glass. Prism causes the light to reflect in other direction. Animated picture of magnifying lens. Workers making glassworks in the Bausch and Lomb Company in New York, mixing sand and glass and then stirring of the molten mass in a furnace. Prince Rupert test of a glass drop. The glass mixture is dropped on ground for test and hammered. Cooling of large pot containing molten glass. Large tongs used to remove clay pot from furnace, and then pot covered with insulating material. Pot broken away after glass is cooled . The big piece of glass is broken into small lenses. Workmen examining and choosing lenses for grinding. Grinding of lenses with polishing agents. Animated picture of lenses in a microscope and the change of the course of the rays of light to show the larger virtual image. Assembly of a microscope. Microscopic view of various germs including typhoid and diphtheria. An unborn chicken in an embryo, viewed through the microscope. Blood circulating in a frog's foot, through the microscope. Malignant blood cells. Crystallization of various chemical elements viewed in the microscope.
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