Creation of the Tennessee Valley Authority. Small lake at Tennessee River Basin. TVA (Tennessee Valley Authority) protects its members and public through its Malaria control program. TVA members on boat spray pesticide next to river area to kill mosquitos. Man with backpack pump walks in shallow water on edge of river, pumping a manual lever on the backpack and applying pesticide along the shoreline.
Teacher teaches under-privileged children at Henry Ford Convalescent School. Druggist at work in laboratory. Man hands prescription to druggist behind counter. The druggist fills the prescription. Technicians work in optical shop.
Temperature and humidity controlled Cabinets. Patients lie on bed. Nurse tucks blanket around patient's bed and checks his pulse and blood pressure. She wraps patient's feet, covering them with thick socks and pushes the bed into cabinet. Nurse closes door leaving patient's head outside the cabinet enclosure.
Narrated feature about human curiosity and basic science. Sunlight glistens on snow-covered mountain edge. Trees on a mountain side. Girl in a hat runs along a mountain slope, beside melting snow fields, picking early spring flowers and putting them in a wicker basket. A boy plucks a flower and examines it with a magnifying glass.
Narrated feature about scientific discoveries and applications of the microscope. Actors portraying invention of microscope in Delft Holland. Actor grinds and polishes a lens. He looks through the microscopic lens at a drop of water and discovers minute living organisms. Actor portraying French chemist Louis Pasteur studies the microscopic forms of life found in the solution of ferment. He discovers that heat kills germs. Men ferment wine. Discussion of pasteurization, vaccinations, and Pasteur. Herd of sheep grazing. Boy contaminated with rabies comes to Dr Louis Pasteur. Boy bitten by a dog. He discovers a vaccine for the deadly rabies and gives it to the boy.
Narrated feature about scientific advances made possible by the microscope. View of a microscope. Chemist looks through a microscope in laboratory. Microscopic view of the living organisms. Milk pasteurized by heated coils in large drums. Milk graded with pasteurization label. Boy drinks a glass of milk. Doctor from London performs an antiseptic surgery on patient. He sterilizes the instruments to be used in the operation. Doctor arrives at a home in Berlin to treat a girl suffering from Diphtheria. View of sick girl in a bed, through an outside window with snow falling. The doctor gives her a diphtheria injection. Girl recovers and walks outside of building and gives a hug to her mother. Young children getting vaccination in a doctors office.
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