17 The equivalent "1 teaspoon=11⁄2 fluid drams" 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 dictionaires. 1 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. 19 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 "hundred weight." 20 The Greek letter gamma (y) is also used as a symbol for "microgram." 1 scruple (s ap or ).. [1 stone (British)]___ 1 ton, gross or long 21 (gross tn). 1 ton, metric (t). (20 grains. 14 avoirdupois pounds. (2 204.623 avoirdupois pounds. 1.102 net tons. 2 000 avoirdupois pounds. 1 ton, net or short (tn or net tn)---0.893 gross ton. (0.907 metric ton. 21 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." Appendix II-INTERPRETATIONS OF CODE MATERIAL This Appendix presents interpretations of Handbook 44 code material, first made as interim interpretations by the Committee on Specifications and Tolerances of the National Conference on Weights and Measures to meet an emergent need, and subsequently ratified by the Conference. The interpretations thus have the same validity as the codes themselves, and should be considered in conjunction therewith. Adjacent to the code material that is subject to an interpretation presented herein, a reference should be entered to the page on which the interpretation in question will be found. SCALES MONEY-VALUE TOLERANCE ON COMPUTING SCALES.-It has been disclosed that in some instances a misunderstanding exists among weights and measures inspectors as to the proper method of checking the money-value graduations on a computing scale chart. In order to establish proper and uniform test procedures, weights and measures officials should follow National Bureau of Standards Handbook 37, entitled TESTING OF WEIGHING EQUIPMENT. On page 147 of this handbook, under the heading "Computing Type," is found the following: NOTE. The weighing portion of a computing scale is to be tested in the same way as has been outlined for a noncomputing scale of similar type of construction. As The money-value graduations on a computing-scale chart are fixed in relation to the weight graduations when the chart is made. part of the routine test of a scale it is practicable to check only a few out of the hundreds or thousands of value graduations on the chart. It is advisable, however, at least to check the zero-load indications for both weight and money values and to check the money values at some one load (representing half-capacity or more) clear across the chart, to make certain that the computed money values agree with the prices-per-pound which are shown, and that the chart is mounted in proper alinement. It should be understood that the money-value graduations are not independent of the weight graduations and, therefore, 1959 Addition |