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...rainbow sight is made by sandwiching a natural crystal or a synthetic sodium nitrate crystal between two layers of polarizing glass. Optical engineers of the Polaroid Corp., manufacturers of the sight, envision many uses for it. Camera fans have already found that it makes an excellent view finder...

Author: /time Magazine | Title: Science: Rainbow Gunsight | 4/9/1945 | See Source »

...Ithaca, N.Y., last week Cornell Entomologist William E. Blauvelt announced the development of a unique insecticide designed for flowers alone. The soil around a plant is soaked with a mixture of sodium selenate and water, which penetrates to roots, sap, foliage and buds. Then, says Dr. Blauvelt, "the bug bites the plants and the plants bite back...

Author: /time Magazine | Title: Science: Botanical Booby Trap | 3/26/1945 | See Source »

...hearted UNRRA (United Nations Relief and Rehabilitation Administration) had a tough job getting Latin American pledges of food for European countries wrecked by war (see INTERNATIONAL). Some Latin American Governments asked that their quotas be drastically reduced. Others offered inedibles, such as sodium nitrate from Chile or huaraches (sandals) from Mexico...

Author: /time Magazine | Title: Latin America: THE HEMISPHERE | 2/19/1945 | See Source »

...average production-8,557 lbs. of milk in 305 days-was nearly twice the U.S. average per cow. Dr. John H. Beattie, technician in charge of Bartlett's group No. 1 at Clinton, N.J., has said that a single servicing from a bull, diluted with egg yolk and sodium phosphate, can be used to inseminate 100 cows. Thus one good bull can service 5,000 cows a year (as compared with 50 by natural mating...

Author: /time Magazine | Title: Science: Every Calf a Blueblood | 12/18/1944 | See Source »

...biggest human setback has been loss of pyrethrum, far & away the deadliest prewar insecticide, of which almost the entire supply came from Japan. The substitutes on which bug fighters now chiefly rely are the new Lethanes (not so deadly) and sodium fluoride (dangerous because poisonous to man). One of the most effective exterminators is ultra-deadly hydrocyanic gas, but against it there is a city ordinance...

Author: /time Magazine | Title: Science: Insect Front | 8/28/1944 | See Source »

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