Gunter's or the surveyors' chain is generally used in surveying land. It is 4 poles, or 66 feet, in length, and is divided into 100 links. 1 10 100 rods 66 feet = 100 links = chains 1 mile (M.). 1 chain (C.). square chain 16 square rods or perches (P.). MISCELLANEOUS TABLE. 12 units or things make 1 dozen. 12 dozen make 1 gross. 12 gross, or 144 dozen make 1 great gross. 20 things make 1 score. 100 pounds make 1 quintal of fish. 18 inches make 1 cubit. 21 22 inches nearly make 1 sacred cubit. 14 pounds of iron or lead make 1 stone. stones make 1 pig. 8 pigs make 1 fother. 196 pounds make 1 barrel of flour. 200 pounds make 1 barrel of pork. WEIGHT PER BUSHEL OF GRAIN, ETC. The following table shows the number of pounds per bushel required, by law or custom, in the sale of articles specified, in the several States of the Union. AREAS OF CIRCLES. HOW TO USE THE TABLE. When the inside capacity of any cylindrical measure is required, from 1 to 25 inches in diameter, take its inside diameter in inches, and multiply the area in table by the depth in inches; the product will give the capacity in cubic inches. If gallons are wanted, divide the product by 231. If quarts, by 57.75. If pints, by 28.875. If bushels are required in a barrel or tierce, first obtain the mean diameter, multiply as above, and divide by 2150.42; the answer will be the number of bushels. In measuring large water tanks, boilers, etc., the inches in table may represent feet, and parts of feet in diameter. Find in the table the area in number of inches that correspond to the number of feet; multiply this by the length in feet, and multiply the result by a cubic foot (7.4805); the product is the answer in gallons, If there should, in any case, be more figures in the divisor than in the dividend, add ciphers. WEIGHT OF ONE FOOT OF FLAT BAR IRON. If a Bar of Iron be thicker than contained in the table add together the weight of two numbers, or treble the weight of one number. Wanted the weight of 1 foot of Bar Iron, 4 inches broad and 2 1-4 inches thick. Opposite 4 and under 1 is 13.364, which doubled is 26.728, add the weight of 1-4th (3.341), equal 30.069 lbs. 4.175 5.219 6.263 7.306 5 4.593 5.741 6.889 8.037 5 8.350 8.768 9.186 11.480 13.778 16.073 18.372 4.801 6 001 7.202 8.402 9.602 12.002 14.404 16.804 19.204 5.010 6.262 7.515 8.767 10.020 12.524 15.030 17.535 20.042 WEIGHT OF SHEET LEAD. The thickness of lead is also in common determined or understood by the weight; the unit being that of a square or superficial foot; thus: 4 lbs. lead is th of an inch in thickness; 6 do. do.; 71⁄2 dọ. 10.437 12.526 14.612 16.700 13.152 15.343 17.536 |