Food For Thought ~ 1949 Pressure Cooking Institute; Spring Byington

more at http://quickfound.net/

Originally a public domain film, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.

The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).

https://en.wikipedia.org/wiki/Pressure_cooking

Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/

Pressure cooking is the process of cooking food, using water or other cooking liquid, in a sealed vessel known as a pressure cooker. This simulates the effects of long braising within a shorter time.

Almost any food that can be cooked in steam or water-based liquids can be cooked in a pressure cooker.

The cooker works by trapping the steam produced from boiling the cooking liquid inside the vessel. This causes internal pressure and temperature to rise quickly. After use, the steam is slowly released so that the vessel can be opened safely...

In 1679, French physicist Denis Papin, better known for his studies on steam, invented the steam digester in an attempt to reduce the cooking time of food. His airtight cooker used steam pressure to raise the water's boiling point, thus cooking food more quickly. In 1681 Papin presented his invention to the Royal Society of London as a scientific study, he was later elected a member.

In 1864, Georg Gutbrod of Stuttgart began manufacturing pressure cookers made of tinned cast iron.

In 1918, Spain granted a patent for the pressure cooker to Jose Alix Martínez from Zaragoza. Martínez named it the olla exprés, literally "express cooking pot", under patent number 71143 in the Boletín Oficial de la Propiedad Industrial. In 1924, the first pressure cooking pot recipe book was published, written by José Alix and titled "360 fórmulas de cocina Para guisar con la 'olla expres'", or 360 recipes for cooking with a pressure cooker.

In 1938, Alfred Vischer presented his invention, the Flex-Seal Speed Cooker, in New York City. Vischer's pressure cooker was the first designed for home use, and its success led to competition among American and European manufacturers. At the 1939 New York World's Fair, the National Pressure Cooker Company, later renamed National Presto Industries, introduced its own pressure cooker...

https://en.wikipedia.org/wiki/National_Presto_Industries

National Presto Industries is a company founded in 1905 in Eau Claire, Wisconsin in the small kitchen appliances industry. Originally called the "Northwestern Steel and Iron Works" and then becoming the "National Pressure Cooker Company" in 1917, the company produced pressure canners. Beginning in 1939, National Presto Industries introduced small home-use cooking appliances. The company was admitted to the New York Stock Exchange on March 3, 1969...