1 millimicron (mμ [the English letter m in combination with the [0.001 micron (exactly). 1 barrel (bbl), standard for fruits, vegetables, and other dry commodities except cranberries.. 1 barrel (bbl), standard, cranberry. 1 bushel (bu) (U. S.) struck measure. [1 bushel, heaped (U. S.)]----- [1 bushel (bu) (British Imperial) (struck measure)]----- 1 cord (cd) (firewood).. 1 cubic centimeter (cm3) _ 1 cubic decimeter (dm3). 1 cubic foot (cu ft).... 1 cu inch (cu in.). 1 cubic meter (m3). 1 cubic yard (cu yd). 10.764 square feet. 31 to 42 gallons.' 7 056 cubic inches. 105 dry quarts. 3.281 bushels, struck measure. (5 826 cubic inches. 8645%4 dry quarts. [2.709 bushels, struck measure. 2 150.42 cubic inches (exactly). 35.238 liters. 2 747.715 cubic inches. 1.278 bushels, struck measure.* [1.032 U. S. bushels, struck measure. 2 219.36 cubic inches. 128 cubic feet. 0.061 cubic inch. 61.023 cubic inches. 7.481 gallons. 28.317 cubic decimeters. 0.554 fluid ounce. 4.433 fluid drams. 16.387 cubic centimeters. 1.308 cubic yards. The question is often asked as to the length of a side of an acre of ground. An acre is a unit of area containing 43 560 square feet. It is not necessarily square, or even rectangular. But, if it is square then the length of a side is equal to √√43 560=208.710+ feet. There are a variety of "barrels" established by law or usage. For example, Federal taxes on fermented liquors are based on a barrel of 31 gallons; many State laws fix the "barrel for liquids" as 3112 gallons; one State fixes a 36-gallon barrel for cistern measurement; Federal law recognizes a 40-gallon barrel for "proof spirits"; by custom, 42 gallons comprise a barrel of crude oil or petroleum products for statistical purposes, and this equivalent is recognized "for liquids" by four States. Frequently recognized as 14 bushels, struck measure. The equivalent "1 teaspoon= 1% fluid arams" has been found by the Bureau to correspond more closely with the actual capacities of "measuring" and silver teaspoons than the equivalent "1 teaspoon=1 fluid dram," which is given by a number of dictionaries. Used in assaying. The assay ton bears the same relation to the milligram that a ton of 2 000 pounds avoirdupois bears to the ounce troy; hence the weight in milligrams of precious metal obtained from one assay ton of ore gives directly the number of troy ounces to the net ton. The gross or long ton and hundredweight are used commercially in the United States to only a very limited extent, usually in restricted industrial fields. These units are the same as the British "ton" and "hundredweight." • The symboly [the Greek letter gamma] is also used. The gross or long ton and hundredweight are used commercially in the United States to a limited extent only, usually in restricted industrial fields. These units are the same as the British "ton" and "hundredweight." WASHINGTON, May 31, 1955. U. S. GOVERNMENT PRINTING OFFICE: 1956 |