Simple Tests for Impurities in Food for Home Chemists
An overview of household tests to detect adulterants in milk butter meat coffee and canned goods. Describes lactometer formaldehyde detection turmeric paper boric acid tests coal tar dyes artificial coloring and tin iron lead salts, with simple procedures and safety notes.
MENTIONED IN THIS ARTICLE
William Lemkin
Lemkin
United States Department of Agriculture
Temkin
Wood Gas for Motors and New Fiber Substitutes
French scientists showcase gazogène gas for gasoline engines at the Versailles Forestry Exposition with charcoal gas distillation, cooling, and storage. London and German reports hint at a flax and linseed based substitute for cotton, suggesting short fibre flax could spin like cotton using existing machinery.
MENTIONED IN THIS ARTICLE
France
Versailles
Scientific American
America
England
Germany
London
Rabbit Fur Industry Heads Toward Multi-Million Scale
The rabbit emerges as a significant source of fur and meat with a nine year growth record. Government experiments at Ontario California and Saratoga Springs support a burgeoning industry, while U S demand and processing methods drive large trade in pelts for fur garments and hats.
MENTIONED IN THIS ARTICLE
United States
Ontario
California
Saratoga Springs
N. Y
New York
United States Bureau of Standards
Martha Shaw
Austria
New Zealand
France
Belgium
England
Australia
United States Department of Agriculture
Willam Stewart
National Rabbit Federation
Zealand
Americar
Chin
Strength and Impact Demonstrated by Hammer and Anvil
A 19th century explanation of action and reaction shows how a strong man bears blows from a sledge hammer. If the hammer weighs ten pounds and moves sixteen feet per second, it could move a lighter anvil, but a heavier anvil resists movement. The lesson notes that the body endures the strike without discomfort due to equal and opposite forces.
Inventors Offer Detachable Grip For Golf Clubs
A Boston man, Sterling D. Rosan, invents a detachable grip to correct stroke errors. The flexible celluloid grip has a U-shaped middle to fit the shaft and two flanges to guide the thumb and forefinger. The article notes another inventor, Charles, proposing a sound-reproducer concept.
MENTIONED IN THIS ARTICLE
Boston
Sterling D. Rosan
Night Plowing and Novel Gadgets Highlight 1920s Farming Techniques
Night plowing with tractor searchlights speeds soil preparation ahead of planting, allowing earlier harvests. Separate notes describe a vibrating paper sheet device for sound waves, a moving radiator figure for cars, and a Newark inventor’s drive cap lamp. Dog nose prints shown as stable identification from infancy to old age, used by veterinarians for lost or stolen pets.
MENTIONED IN THIS ARTICLE
Louis V. Aronson
Newark
N. J
Chicago
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