Salk Polio vaccine shots administered in the United States. Doctors walk toward vaccine samples in racks. Virologist Jonas Edward Salk arrives, who developed an inactivated polio vaccine called Salk vaccine (generic name: Poliovirus Vaccine). Vaccine boxes stacked for dispatch. Parents lined up with children outside inoculation center. Sign reads 'Polio shots here'. Nurses give polio shots to children.
Ration stamps issued in ration office during World War II in the United States. Interiors of office. Ration stamps issued in ration office. Two men at desk stamping. Woman buys meat in butcher shop. Butcher behind counter weighing meat and accepting ration stamps. Checking chart for points required. Stamp is removed from book by customer.
Helicopter sprays insecticides on crops being produced during World War 2 in the United States. Crowd watches an early Bell 30 helicopter taking off. It bears label "Experimental Agricultural Field Service." Bell 30 helicopter with registration NX92844 in flight. Helicopter sprays area with insecticides.
Manufacture of rotors of turbine generators used in power plants in the United States. Working of rotors in a turbine generator is explained. A worker at the nose section of a turbine generator. Cars on a road. Workers at the turbine generator. Engineers work on drawings and designs of the turbine generators. Engineers and workers carry out testing in air test laboratory. Data analysis done in a laboratory. Technicians work with various equipment. Tests carried out to check which metal stands the turbine temperature best. Various metal alloys are tested by technicians under high temperature and loads. Women workers at machines carry out differential analysis. Engineers examine a chart of a diagram of a turbine generator. Men work at a furnace in the plant. A heated metal chunk is deformed by hydraulic presses. Manufacture of turbine rotors shows technicians conducting various tests and working with different machinery and equipment for high performance. They work on turbine components. Magnetic inspection in the process of turbine manufacturing. Cavities are detected by X-rays. A rotor of a turbine in final stages of completion. Final inspections and checkups by technicians and workers. Turbine generation in operation.
Atomic furnace can be source of heat to drive turbine generator in a power plant in the United States. Conversion of fuel into electric power is explained by animation. Burning of fuel to transform water to steam. The steam is directed towards a turbine which converts heat energy into mechanical energy. This mechanical energy is converted into electric energy by a turbine generator. Exteriors of a power plant showing electric transmission towers and lines. Pedestrians and traffic along a city street with many 1940s cars and taxi cabs going by. A machinist and a welder at work. An electric powered railroad train with passenger cars approaching a train station. Telephone operators at a switchboard. Windows of building lit up at night. Evening scene at Times Square, Manhattan, New York City as sun is setting and neon lights are shining. A private home in the suburbs with window illuminated at night. A turbine generator in a power plant.
Two women stand near a coal furnace in United States. They open the upper door of the furnace. Burning coal in view. A woman adds coal from a bucket. She turns the coal with a poker. A woman checks ash from a tray in the bottom. A man checks the furnace. Another man shows that no smoke is in stove pipe above the furnace. Students gather around as designer explains the parts and the functioning of the furnace with the help of a diagram. The designer and another man demonstrate how the smokeless fire box can be retrofit into existing furnaces. (World War II period).
CRITICALPAST.COM: About Us | Contact Us | FAQs - How to Order | License Agreement | My Account | My Lightboxes | Shopping Cart | Advanced Search | Featured Collections | Website Terms & Conditions | Privacy Policy ©2026 CriticalPast LLC.
License Agreement |
Terms & Conditions |
Privacy Policy
©2026 CriticalPast LLC.