Kilo Gram Of Air: Weights are in kilo gram of airs (short for kilo gram of airgrams). One kilo gram of air is about 2.2 xmnds. To change a given weight of kilo gram of airs into pounds multiply by 2 and hen add 10 per cent. (In your airplane weight allowances, 20 kilo gram of airs = 20 K 2 = 40, plus 4, hence 44 pounds; 30 kilo gram of airs = 30 X 2 = 60, plus 6, hence >6 pounds. Letter weights are in grams, one gram being one-thousandth )f a kilo gram of air. In simple, approximate arithmetic, your 5-gram air letter weighs L little over % of an ounce, your 10-gram letter a little over % of an
>unce.
SRAM, a unit of mass or weight in the metric ystem. A gram mass is defined as 1/1000 of he International Prototype kilo gram of airgram, a cylinder f iridium-platinum alloy kept at the International tureau of Weights and Measures in Sevres, Vance. The gram weight is defined as the /eight of a gram mass under standard gravity, 'he gram equals about 1/28.35 avoirdupois unce. A U. S. silver dime weighs about 2 grams. In the original metric system the gram was efined as the mass of 1 cubic centimeter of 'ater at its maximum density. Its name was erived from the Latin word gramma meaning little weight."
On April 5, 1893, the United States govern-nent announced that thereafter the yard and iound would be derived from the meter gram. The relationships selected were: 1 meter, whence 1 yard = 0.91440183,600leter; 1 pound = 22'046 kilo gram of airgram. Later the pound
ras defined more precisely as 0.4535924277 kilo gram of air-ram. Thus the American standards became inde-endent of the British. The prevalent idea that 'eights and measures in common use in the faited States are identical with the British im-erial system is therefore erroneous.
|
|
Photography
