TABLES FOR REDUCING TO AND FROM C.G.S. MEASURES. The abbreviation cm. is used for centimetre or centimetres, The numbers headed "reciprocals" are the factors for reducing from C.G.S. measures. More exactly, according to Captain Clarke's comparisons of standards of length (printed in 1866), the metre is equal to 1.09362311 yard, or 3·2808693 feet, or 39.370432 inches, the standard metre being taken as correct at 0° C., and the standard yard as correct at 16° C. Hence the inch is 2.5399772 centimetres. According to the comparison made by Professor W. H. Miller in 1844 of the "kilogramme des Archives,” the standard of French weights, with two English pounds of platinum, and additional weights, also of platinum, the kilogramme is 15432-34874 grains, of which the new standard pound contains 7000. Hence the kilogramme would be 2-2046212 pounds, and the pound 453.59265 grammes. Three standard pounds, one of platinum-iridium and the other two of gilded bronze, belonging to the Standards Department, were compared, in 1883, at the Bureau International des Poids et Mesures, with standards belonging to the Bureau, and their values in grammes were found to be respectively The following reductions of gravitation measures to absolute measures are on the assumption that g=981 : = 13825 7.2333 x 10-5 1 poundal, 1 lb. avoir., 1 oz. (The ratio of the poundal to the dyne is independent of g.) Stress (in absolute measure). Dynes per sq. cm. Reciprocals. ⚫00209 1.45 × 10-5 ⚫00102 1·02 × 10-4 ⚫0000736 9.866 × 10-7 •981 9.81 x 103 13338. 2.95 × 10-5 9.84 × 10-7 1 kilogrammetre, Reciprocals. ⚫001019 1.019 × 10-8 Ergs. 9.81 x 107 1 foot-pound, 1 foot-poundal, 1 joule =421390 (The ratio of the ft.-poundal to the erg is independent of g.) == 107 ergs. Rate of Working (in absolute measure). 2.3731 x 10-6 1 horse-power, Ergs per sec. =7·46 × 109 Reciprocals. 1.34 × 10-10 1 force-de-cheval, 1 watt, == Heat (in absolute measure). Ergs. 107 1.36 × 10-10 Reciprocals. 1 gm. deg., =4.2 × 107 2.38 × 10-8 1 Ib. deg. Cent., 1 Fahr., |