CONVERSION TABLES. By means of the tables on pages 8 and 9, metric measures can be converted into English, and vice versa, by simple addition. All the figures of the values given are not required, four or five digits being all that are commonly used; it is only in very exact calculations that all the digits are necessary. Using table, proceed as follows: Change 6,471.8 feet into meters. Any number, as 6,471.8, may be regarded as 6,000 + 400 +70 + 1 +.8; also, 6,000 1,000 × 6; 400 = 100 X 4, etc. Hence, looking in the left-hand column of the upper table, page 39, for figure 6 (the first figure of the given number), we find opposite it in the third column, which is headed "Feet to Meters," the number 1.8287838. Now, using but five digits and increasing the fifth digit by 1 (since the next is greater than 5), we get 1.8288. In other words, 6 feet 1.8288 meters; hence, 6,000 feet = 1,000 X 1.8288 = 1,828.8, simply moving the decimal point three places to the right. Likewise, 400 feet = 121.92 meters; 70 feet 21.336 meters; 1 foot-.3048 meter, and .8 foot = .2438 meter. Adding as shown above, we get 1,972.6016 meters. 1,972.6046 Again, convert 19.635 kilos into pounds. The work should be perfectly clear from the explanation given above. The result is 43.2875 pounds. The only difficulty in applying these tables lies in locating the decimal point; it may always be found thus: If the figure considered lies to the left of the decimal point, count each figure in order, beginning with units (but calling unit's place zero), until the desired figure is reached, then move the decimal point to the right as many places as the figure being considered is to the left of the unit figure. Thus, in the first case above, 6 lies three places to the left of 1, which is in unit's place; hence, the decimal point is moved three places to the right. By exchanging the words "right" and "left," the statement will also apply to decimals. Thus, in the second case above, the 5 lies three places to the right of unit's place; hence, the decimal point in the number taken from the table is moved three places to the left. 1,828.8 121.92 21.336 .3048 .2438 22.046 1.3228 .0661 .0110 43.2875 English. CONVERSION TABLE-ENGLISH MEASURES INTO METRIC. Metric. Inches to Metric. Metric. Square to Square Feet to Pounds to Kilos. .3047973 .6095946 .9143919 .0253998 .0507996 .0761993 .1015991 1.2191892 1.8237838 2.7215550 22.7118732 26.4971854 .1269989 1.5239865 3.1751475 30.2224976 2.7431757 4.0823325 34.0678098 Metric. CONVERSION TABLE-ENGLISH MEASURES INTO METRIC. Metric. Square Feet .4535925 .9071850 1.3607775 1.8143700 2.2679625 to Square Metric. Cubic Feet to Cubic Meters. Metric. .000645150 .092901394 .028316094 .226528752 .005806350 .836112546 .254844816 .006451500 .929013910 .283160940 Gallons to 3.7853122 7.5706244 11.3559366 15.1412488 18.9265610 1234567800 English. Meters to Meters to Feet. English. 39.370432 2.2046223 3.2808693 4.4092447 78.740864 118.111296 9.8426079 6.6138670 157.481728 13.1234772 8.8184894 Square to Square English. English. English. English. Kilos to CONVERSION TABLE-METRIC MEASURES INTO ENGLISH. Square Meters to Square Feet. English. Cubic Meters to Cubic Feet. Liters to .2641790 .5283580 .7925371 1.0567161 1.3208951 1.5850741 1.8492531 2.1134322 2.3776112 2.6417902 English. Kilos per Square Meter to Pounds per Square Inch. 1,550.03092 10.7641034 35.3156163 .001422310 75.3487238 247.2093141 .009956170 .001378480 96.8769306 317.8405467 .012800790 .014223100 353.1561630 SPECIFIC GRAVITIES AND WEIGHTS. The specific gravity of solid or liquid body is the ratio between its weight and that of a like volume of distilled water. If the solid is of irregular shape, its specific gravity may be found by weighing it in air and in water; the loss of weight in water is the weight of an equal volume of water; hence, if Wis the weight in air, and W' the weight in water, W W-W the specific gravity is The weight of water in various conditions is as follows: |