METRIC-ENGLISH EQUIVALENTS. 95 Centigramme=gramme. Decigramme=gramme. 1 gill = 1.4198306 decilitres. 1 pint=567932246 litres. 1 quart=1.13586449 litres. 1 gallon = 4.543457970 litres. 1 peck=908691594 decalitres. 1 bushel=3.634766376 decalitres. 1 quarter 2.9078131 hectolitres. 1 cub. ft.-28.3153119 litres. 1 grain = 6479895 decigrammes. 1 dwt.=1·55517481 grammes. = 1 oz. Tr. 3.1103496 decagrammes. Gramme weight of a c. cm. of 1 lb. Tr. = 373241954 kilogrammes. pure water at 4° C. Decagramme=10 grammes. 1 scruple = 1.29597901 grammes. 1 dr. Ap. 3887937 decagrammes. 1 dr. Av.=1·771847 grammes. 1 oz. Av.=2·834954 decagrammes. 4. Conversion of Metric and English Quantities by the Methods of Approximation. The equivalents given above enable us to convert metric to imperial or imperial to metric units by multiplication or division. The methods of approximation greatly abridge the labour. Example 1. To convert 8561.237 kilogrammes to lbs. 1 kilog. = 2.2046213 lbs. Multiply correct to two places. 8561.237 31264 022 17122 474 1712 247 34 245 5 137 171 18874.285 lbs. Example 2. To convert 5804 qrs. 7 bush. 3 pks. to hectolitres. 1 qr. 2.9078 hectolitres. = 5804 qrs. 7 bush. 3 pks. =5804.96875 qrs. Multiply correct to two places. 87 092 11609 937 5224 471 44 643 16879-685 hectols. Example 3. From the relation 1 metre = 1.0936331 yds. obtain the value of 1 yd. in decimals of a metre. 1.0,9,3,6,3,3,1) 100000000 (9143834 ..1573021 479388 41935 9126 377 49 CONVERSION BY MULTIPLES. 97 Example 4. Given that 1 sq. yd.=836097 sq. metre, find value in sq. yds. of 3.286581 sq. metres. 2. Given the value of 1 yard in metres and 1 lb. in kilogrammes correct to 5 places. Find value of 726 metres in yards and 3250 kilogrammes in cwts. correct to 3 places. 3. Verify these results given among the equivalents. (1) 1 hectolitre in bushels from the value of 1 gallon in litres. (2) 1 acre in hectares from the value of 1 sq. yard in sq. metres. 5. Conversion of Metric and English Quantities by the Method of Multiples. The following Tables give the values of 1, 2, 3, 4, 5, 6, 7, 8, 9 French or English units in terms of the main English and French units. With the aid of these it is extremely easy to convert any metric quantity of commerce into the English equivalent desired or vice-versâ by moving the points and adding. Very slight modifications in using the tables actually given will enable us to get the metric or imperial equivalent for any quantity expressed in any form. Examples will render these points clear. In the case of a decimal the point moves to the left. 5. Convert 9321 kilogrammes to lbs. 19841.591 661.386 44.092 2.205 20549.274 lbs. 6. Convert 25 tons 17 cwts. 3 qrs. to quintals. 203.20951 50.80238 5.08024 3.55617 •38102 263-02932 quintals. Note. The Tables here given are like the Government Tables but are taken to further places in general. Allowance is made for places beyond those given except in the case of those equivalents which are taken as absolute, viz. centimetres to inches, and grams to grains. EQUIVALENT MULTIPLES. LENGTH. 99 Centimetres to inches. ⚫3937079 ⚫7874158 2 3.280899167 11.093633056 3 9-842697500 3 3.280899167 Kilometres to miles. ⚫6213824 2 1.2427648 1.8641473 3.1069121 4 13.123596667 4 4.374532222 4 2.4855297 5.5924418 9 1 2-539954113 1 •3047944936 1 9143834807 1 1.6093149 3.2186299 4.8279448 6.4372597 2 5.079908226 2 6095889872 2 1.8287669615 2 3 7-619862339 3 9143834807 3 2.7431504422 | 3 4 10-159816452 4 1.2191779743 4 3.65753392404 5 12-699770566 5 1.5239724679 5 4.5719174037 5 8.0465746 6 15-239724679 6 1-8287669615 6 5.4863008845 6 9.6558896 7 17-779678792 7 2.4335614551 7 6.4006843752 7 11-2652045 8 20-319632905 8 2.4383559487 8 7.3150678570 8 12-8745194 922-859587018 9 2.7431504422 9 8-2294513367 9 14-4838343 Note. 1 furlong = 10 chains = 1000 links. •1550059105 110-76429934 1 3100118210 2 21.52859868 2 4650177316 3 32-29289803 3 6200236421 4 43.05719737 | 4 7750295526 5 53-82149671 5 9300354631 6 64.58579605 1.0850413737 7 75-35009540 7 1.2400472842 8 86-11439474 8 1.3950531947 9 96.87869408 9 10-764299342 9 22-2402878 8-372232822 7 17.2980016 9.568266082 8 19-7691447 6.4513668971 1-0928996833 1 8360971499 1 212-9027337942 2 185799366621-6721942997 2 ⚫809342041 3 19-3541006913 3 2786990500 32.5082914496 3 1.214013062 4 25.8054675884 4 3715987333 43.3443885994 4 1.618684083 532-2568344855 5 4644984166 5 4.1804857493 5 2.023355103 638-7082013826 65573980999 6 5.0165828992 6 2-428026124 7 45-1595682797 7 65029778327 5.8526800490 7 2.832697145 8 51.6109351768 87431974665 8 6.6887771989 8 3.237368165 9 58-0623020740 9 8360971499 9 7-5248743487 93-642039186 Note. 1 hectare = 10000 sq. metres. 1 acre = = 10 sq. chains. 7--2 |