## Circular of the Bureau of Standards, Issue 570 |

### From inside the book

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Page 2

Units of weight included weights of kernels of

Units of weight included weights of kernels of

**grain**and weights of shells . At first these units were not very definitely defined . Later they became somewhat more definite when , for example , the foot became the length of the foot of ... Page 3

Of units of weight , one of the earliest is the

Of units of weight , one of the earliest is the

**grain**, which was originally the weight of a**grain**of ... The Roman pound was divided into 12 ounces ( unciae , meaning twelfth parts ) of 437**grains**each . This system was introduced into ... Page 11

The

The

**grain**is 1/7 000 of ... The troy ounce and the apothecaries ounce differ from the avoir- dupois ounce but are equal to each other , and equal to 480**grains**. The avoirdupois ounce is equal to 4371⁄2**grains**. Page 19

1 bushel ( bu ) = 2 150.42 cubic inches = 32 quarts . AVOIRDUPOIS WEIGHT & [ The "

1 bushel ( bu ) = 2 150.42 cubic inches = 32 quarts . AVOIRDUPOIS WEIGHT & [ The "

**grain**" is the same in avoirdupois , troy , and apothecaries weight . ] 27 11/32**grains**16 drams = 1 dram ( dr ) . - 1 ounce ( oz ) = 4371⁄2**grains**. Page 24

... 047 0.113 513 1.135 13 0.028 378 0.283 78 0.001 860 10 3.214 255 8 0.000 465 025 0.803 563 95 UNITS OF MASS NOT GREATER Units

... 047 0.113 513 1.135 13 0.028 378 0.283 78 0.001 860 10 3.214 255 8 0.000 465 025 0.803 563 95 UNITS OF MASS NOT GREATER Units

**Grains**Apothecaries scruples Pennyweights Avoirdupois drams Apothecaries drams Avoirdupois ounces 1**grain**...### What people are saying - Write a review

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### Common terms and phrases

acre adopted apothecaries avdp avoirdupois pound balance barrel body Britain British Bureau of Standards bushel calibration capacity Circular coal contains convenient corresponding cubic centimeter cubic decimeter cubic feet cubic foot cubic inches decimal defined Definitions difference divided early earth engineers equal equivalent example fields FIGURE fluid drams fluid ounces fundamental gallon given grains grams hundredweight inch exactly indicate industry interest International International Bureau kilogram known laboratory liquid liter material mean meter metric system mile milligrams milliliters millimeters National Bureau origin physical pint precision present Prototype Meter publications published quart reference relation respectively Roman scales scruple short square square meter square yard standards of length standards of mass statute subdivisions system of weights tables Tests tonnage tons troy pound units usually various volume weights and measures yard

### Popular passages

Page 18 - Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq. yd.) 30£ square yards = 1 square rod (sq.

Page 18 - Cubic Measure 1728 cubic inches (cu. in.) =1 cubic foot (cu. ft.) 27 cubic feet = 1 cubic yard (cu. yd.) 128 cubic feet = 1 cord (cd...

Page 29 - 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.

Page 4 - The essential features of the system were embodied in a report made to the French National Assembly by the Academy of Sciences in 1791. A number of other nations were invited to cooperate with France in establishing the new system, and Holland, Denmark...

Page 12 - When an equal-arm balance is used to compare an object with standards of mass ("weights"), the effects of variations in the acceleration of gravity are self-eliminating and need not be taken into account, but the apparent mass of the object is slightly different from the true mass because of the buoyant effects of the surrounding air. Mass can then be computed from apparent mass by applying a correction for air buoyancy. When a spring balance is used, an additional correction accounting for the local...

Page 20 - Dry Measure. — 2 pints = 1 quart; 8 quarts = 1 peck; 4 pecks = 1 bushel.

Page 14 - The mean solar day is divided into 24 hours, each hour into 60 minutes, and each minute into 60 seconds.

Page 4 - The liter is defined as the volume occupied, under standard conditions, by a quantity of pure water having a mass of 1 kilogram. This volume is very nearly equal to 1 000 cubic centimeters or 1 cubic decimeter; the actual metric equivalent iĦ.

Page 20 - The meter bars, however, continue in use as a standard for most types of measurements. In the metric system, designations of multiples and subdivisions of any unit may be arrived at by combining with the name of the unit the prefixes deka, hecto, and kilo, meaning, respectively, 10, 100, and 1,000, and deci, centi, and mill!, meaning, respectively, one-tenth, onehundredth, and one-thousandth.