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Production. Milling machines and machine castings. We are inclined to compare all liquids with water. Iron trickles through little channels with a speed that makes water look sluggish -- a surprising thing until you realize that, molten or not, it's still heavy as iron. Location: a large Midwest machine tool factory

Production. Milling machines and machine castings. We are inclined to ...

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

Salinas, California. Intercontinental Rubber Producers. Guayule rubber "worms." In the factory the guayule shrub is put through various choppers and crushers while mixed with liquids. After being crushed and rolled, it goes to settling tanks where these "worms" form as the bagasse sinks to the bottom. Later the "worms" are dried and go through rollers to form a cake of rubber

Salinas, California. Intercontinental Rubber Producers. Guayule rubber...

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

Studying why fruits taste that way. E.K. Nelson of the Department of Agriculture is shown making tests with an apparatus which the Department imported from Germany for the purpose of studying the essential oils or "flavor-giving" content of fruits and vegetables. At present chemists are acquainted with the essential oils of only a few fruits, such as some of the citrus group. The apparatus is a vacuum distill which permits the distillation of liquids at temperatures much lower than usual by reducing the pressure, 1/10/31

Studying why fruits taste that way. E.K. Nelson of the Department of A...

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

After the oil is extracted from chopped olives by means of hydraulic pressure, the oily mixture is pumped into settling tanks where the oil rises to the top and the non-oily liquids sink to the bottom. Lindsay, California

After the oil is extracted from chopped olives by means of hydraulic p...

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

On the mill rollers. First the raw rubber is wedged into the revolving steel drums and mashed into a flat sheet which clings to one of the rollers like clothes sometimes stick to a clothes-wringer. Powders and liquids tossed into the center of this surging mass soon become a part of it. Firestone (General Tires), Akron, Ohio

On the mill rollers. First the raw rubber is wedged into the revolving...

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.

Civilian defense. Fire prevention. Gasoline, naptha, benzine, and other highly flammable liquids are too dangerous for general use around the home. The cleaning of clothes in the home should be done with one of the many non-flammable preparations now on the market. The other dangerous liquids should not even be stored in the home. They started 20,000 fires last year, resulting in the destruction of four million dollars of property

Civilian defense. Fire prevention. Gasoline, naptha, benzine, and othe...

Public domain photograph of 1930s industry, war production in the United States free to use, no copyright restrictions image - Picryl description

Guayule rubber "worms." Salinas, California. In the factory the guayule shrub is put through various choppers and chrushers while mixed with liquids. After being crushed and rolled it goes to settling tanks, where these worms from as the bagasse sink to the bottom. Later the worms are dried and go through the rollers to form a cake of rubber

Guayule rubber "worms." Salinas, California. In the factory the guayul...

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