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"Share The Meat" recipes. Braised stuffed heart. Brown the hearts on all sides in fat, then place in a covered baking dish or casserole. Add a half of cup of water, cover closely and cook until tender in a very moderate oven (about 300 degrees Fahrenheit). Calf hearts require about one and a half hours, beef hearts will require much longer--four to five hours to cook till tender

"Share The Meat" recipes. Braised stuffed heart. Brown the hearts on a...

Molten metal from blast furnaces arrives at the open hearth foundry where it is placed in a 600 ton mixing furnace, which maintains a temperature of 2100 degrees fahrenheit. The mixing furnace acts as a sort of thermos bottle, or ore storage tank. A worker is shown here preparing an open hearth furnace for charging

Molten metal from blast furnaces arrives at the open hearth foundry wh...

Public domain photograph of industrial architecture, factory building, free to use, no copyright restrictions image - Picryl description

Production. Tin smelting. "Pot boilers" of a Southern tin smelter in which the pure metal is kept at a temperature of about 750 degrees Fahrenheit until it is poured into molds. The plant, which processes South American ore is the finest and the most modern in the world

Production. Tin smelting. "Pot boilers" of a Southern tin smelter in w...

Public domain photograph of industrial architecture, factory building, free to use, no copyright restrictions image - Picryl description

Aluminum. Reynolds Metal Company, Louisville, Kentucky. Ingots of "strong alloy" aluminum go through a rolling mill at a temperature of 800 degrees Fahrenheit

Aluminum. Reynolds Metal Company, Louisville, Kentucky. Ingots of "str...

Picryl description: Public domain image of an industrial building, factory, workshop, workers, 20th century, free to use, no copyright restrictions.

San Bernardino, California. Cars being precooled at the ice plant. Air at a temperature of twenty degrees Fahrenheit is blown through the cars for twenty minutes in one direction, then in the other. Shippers specify the number of hours precooling required for their product

San Bernardino, California. Cars being precooled at the ice plant. Air...

Picryl description: Public domain photograph of a road works, construction, excavation, free to use, no copyright restrictions.

San Bernardino, California. Cars being precooled at the ice plant. Air at a temperature of twenty degrees Fahrenheit is blown through the cars for twenty minutes in one direction, then in the other. Shippers specify the number of hours precooling required for their product

San Bernardino, California. Cars being precooled at the ice plant. Air...

Public domain photograph of California industry, no copyright restrictions image - Picryl description

Government scientist cools water to -6ʺ without freezing it. Washington, D.C., Aug. 9. The belief that water freezes at 32 degrees fahrenheit has been blasted by Dr. N. Ernest Dorsey, scientist of the National Bureau of Standards. Neither does all water freeze at the same temperature. These discoveries have been made by Dr. Dorsey after experimenting with 37 specimens of water taken from lakes, canals, and other sources. He has cooled water until it was minus 6 degrees fahrenheit that is, 38 degrees colder that the so called freezing point of 32 degrees. Yet it remained liquid, 8/9/38

Government scientist cools water to -6ʺ without freezing it. Washingto...

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

New Idria, California. A rotary kiln at the mercury extraction plant of the New Idria Quicksilver Mining Company. A 1200 degree Fahrenheit heat drives off the sulphur and vaporizes the mercury, later condensed

New Idria, California. A rotary kiln at the mercury extraction plant o...

Picryl description: Public domain image of a factory, plant, manufacture, assembly line, industrial facility, early 20th-century industrial architecture, free to use, no copyright restrictions.

New Idria, California. A rotary kiln at the mercury extraction plant of the New Idria Quicksilver Mining Company. A 1200 degree Fahrenheit heat drives off the sulphur and vaporizes the mercury which is later condensed

New Idria, California. A rotary kiln at the mercury extraction plant o...

Public domain photograph - California, United States, World War Two, free to use, no copyright restrictions image - Picryl description

Testing one of 12,000 General Electric electrically heated flying suits being made for the U.S. Air Corps, at sixty-three degrees below zero (Fahrenheit) in cold room at Fort Monmouth, New Jersey. D. C. Spooner, Jr., head of General Electric pioneer products division, Bridgeport, in suit

Testing one of 12,000 General Electric electrically heated flying suit...

Public domain photograph of New Jersey in 1930s, free to use, no copyright restrictions image - Picryl description

Aluminum. Reynolds Metal Company, Louisville, Kentucky. "Strong alloy" aluminum ingots, approximately six inches square, are loaded into the heating furnace where they are heated to 800 degree Fahrenheit before rolling operations

Aluminum. Reynolds Metal Company, Louisville, Kentucky. "Strong alloy"...

Picryl description: Public domain image of a worker, labor, factory, plant, manufacture, industrial facility, 1930s, mid-20th-century industrial photo, free to use, no copyright restrictions.

Production. Mercury. Rotary kiln in a mercury extraction plant at New Idria, California, in which ore is introduced to a temperature of 1,200 degrees Fahrenheit. This heat drives off the sulphur and vaporizes the mercury which is later condensed. Triple- distilled mercury is produced at the plant by the New Idria Quicksilver Mining Company from cinnabar, an ore containing sulfur and mercury, mined at a number of workings near the plant

Production. Mercury. Rotary kiln in a mercury extraction plant at New ...

Picryl description: Public domain image of a factory, plant, manufacture, assembly line, industrial facility, early 20th-century industrial architecture, free to use, no copyright restrictions.

A poster comes to life. The same kind of tiny hourglasses which time the nation's three-minute breakfast eggs are used to measure the heating time of steel in an annealing oven, where the metal is "cooked" at temperatures up to 1,400 degrees Fahrenheit. Allegheny-Steel, Pittsburgh, Pennsylvania

A poster comes to life. The same kind of tiny hourglasses which time t...

Public domain photograph of Pennsylvania in 1930s, free to use, no copyright restrictions image - Picryl description

Production. Tin smelting. A section of the smelting or furnace building of a large Southern plant in which pure tin is extracted from South American ore. At the left is a row of "pot boilers" in which the pure tin is kept at a temperature of about 750 degrees Fahrenheit until it is poured into molds. The plant is the finest of its kind in the world

Production. Tin smelting. A section of the smelting or furnace buildin...

Public domain photograph of 1930s America, free to use, no copyright restrictions image - Picryl description

"Why is an Earthquake" Washington, D.C., Dec. 17. The old question "why is an earthquake," and many other geological mysteries important to man, are being probed by scientific gadgets such as the two pictured here at the Geological Laboratory of the Carnegie Institute. The scientists work and apparatus will be studied by geologists from all points of the country when the Geological Society of America meets in Washington December 28-30. Dr. J.F. Schairer, physical chemist of the laboratory is shown at the instrument panel of one of t he cylindrical electrical furnaces which generate heat up to 2100 degrees Fahrenheit, melting artificial rock in the study of crystallization or cooling of rocks from volcanoes. 12/17/37

"Why is an Earthquake" Washington, D.C., Dec. 17. The old question "wh...

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description