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ammonium

ammonium sulphite

bacteriology

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Miss Jeanne Dougherty, graduate in Bacteriology, working in the laboratory in the Dairy Industry Department. She is conducting experiments on the effects of acids on flavor of butter. Iowa State College. Ames, Iowa

Miss Jeanne Dougherty, graduate in Bacteriology, working in the labora...

Picryl description: Public domain photograph of the 1930s - 1940s, woman, female portrait, United States, free to use, no copyright restrictions.

Scotch machine, Washington, D.C., September 8. This machine, exhibited at the World Power Conference which is being held here, is devised so as to use every inch of matter contained in coal. The coal is put in the retort and heated to a temperature of 1832 degrees. From the smoke and gas, Tar, Ammonium Sulphite, sulphur, light oils and gas are derived and from the tar, medicines, aromatic oils, perfumes, dyes, and acids are derived. From the light oils, motor fuel is obtained. In short: this machine wastes nothing at all

Scotch machine, Washington, D.C., September 8. This machine, exhibited...

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

Conversion. Rendering of household fats. Bagging finished meat scrap at a fat rendering plant. This material, made from cracklings produced in the rendering of waste household fats, is used as animal food. It contains fifty percent of proteins, free fatty acids, some grease and waste ash. It is important in that it aids directly in the raising of animals used for human food

Conversion. Rendering of household fats. Bagging finished meat scrap a...

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.

Scotch machine, Washington, D.C., September 8. This machine, exhibited at the World Power Conference which is being held here, is devised so as to use every inch of matter contained in coal. The coal is put in the rettort and heated to a temperature of 1832 degrees. From the smoke and gas, Tar, Ammonium Sulphite, sulphur, light oils and gas are derived and from the tar, medicines, aromatic oils, perfumes, dyes, and acids are derived. From the light oils, motor fuel is obtained. In short: this machine wastes nothing at all

Scotch machine, Washington, D.C., September 8. This machine, exhibited...

Public domain photograph of Washington DC, free to use, no copyright restrictions image - Picryl description

Miss Jeanne Dougherty, graduate in Bacteriology, working in the laboratory in the Dairy Industry Department. She is conducting experiments on the effect of acids on the flavor of butter. Iowa State College. Ames, Iowa

Miss Jeanne Dougherty, graduate in Bacteriology, working in the labora...

Picryl description: Public domain photograph of the 1930s - 1940s, woman, female portrait, United States, free to use, no copyright restrictions.

Six stages of fat salvage. Shipped in metal drums, the glycerine is no longer recognizable as waste fat. Its nitric and sulphuric acids are added, it becomes deadly nitroglycerine for explosives. When gylcerine is allocated to one of our allies, it is usually shipped in its harmless state

Six stages of fat salvage. Shipped in metal drums, the glycerine is no...

Picryl description: Public domain image of military shooting, machine gun, artillery, armed conflict, free to use, no copyright restrictions.