New Gadgets And Inventions Highlighted In Gadget Bulletin 308
The article lists several new devices including a fountain pen with a magic sphere nib offering 40 hours of writing between refills and four color ink cartridges, an oxygen impurity detector using a galvanometer, a precious metal catalyst center, and a selenium filled rectifier. Also described are a parasol with head gear, a line-throwing gun for the Merchant Marine, a CO2 cartridge float-inflating projectile, a true air speed indicator integrating speed altitude and temperature, a tiny bright light source using a zirconium oxide cathode, and potential uses in microscope illumination ultraviolet light photography and lensless projection.
Symbolic Fish Sign Vanishes From Easter Observances
Eastertide recalls religious symbols once widely used even by skeptics. The Sign of the Fish, formed from the Greek ICHTHOS, served as a covert password for persecuted early Christians and is now rarely observed by devout or orthodox believers.
MENTIONED IN THIS ARTICLE
Jesus Christ
God
Christ
Giant Lilies With Lasting Beauty
Easter lilies grown at the U S Department of Agriculture Beltsville station are projected to be much larger and longer lasting due to colchicine induced chromosome doubling. The sterile flowers retain shape and luster longer, with blooms up to seven inches wide and throats about a foot long, as scientists like Dr. Samuel L Emsweller refine them before release to private growers. Other plants, including snapdragons, are being developed similarly.
MENTIONED IN THIS ARTICLE
Great Experiment Station
U. S. Department of Agriculture
Beltsville
Washington
Samuel L. Emsweller
U.S. Department of Agriculture
Easter Egg Patterns from Crayons and Wax Dyes
Instructions from Science Service show how to color Easter eggs using inexpensive crayons. Boil eggs then melt crayons in hot water with vinegar to create wax patterns on the shells, and dry before serving or hiding.
MENTIONED IN THIS ARTICLE
Haif
Science Service
Growth of World Population Speeds Up 1900 to 1940
The world population rose fastest between 1900 and 1940 with an annual increase about 19 percent higher than 1850 to 1900. If growth continues, the earth could top over 21 billion by 2240, notes Dr. Kingsley Davis of Princeton. In 1940 about 2.0 billion people inhabited the globe.
MENTIONED IN THIS ARTICLE
Kingsley Davis
Office of Population Research
Princeton University
Also Mentioned on This Page
U. S
N St
N. W
Washington, D. C
By Science Service
By A. C. Monahan
Western Hemisphere
America
Europe
Far East
State Colleges of Agriculture
New York College of Agriculture
Cornelly
Rhode Island State College
United States
Great Atlantic and Pacific Tea Company
Fremont Davis
Dr. Emsweller
By Joseph H. Kraus
Science Clubs of America
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