An Important Question in Metrology Based Upon Recent And Original Discoveries

Cover An Important Question in Metrology Based Upon Recent And Original Discoveries
An Important Question in Metrology Based Upon Recent And Original Discoveries
Totten, Charles A[diel] L[ewis] 1851-
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Dividing each of the above nu'm- bers by it (i. E. , by 1. 30208$ ultimates), we have, For troy weight 24 grains = i pennyweight (as before).
For apothecary weight 20 " = i scruple (as before). For avoirdupois weight 30 " = i dram (as now rectified}.
WEIGHT MEASURE. 49 Hence we have rediscovered the rationale of the traditional subdivision of the pennyweight into twenty-fourths, and of the scruple into twentieths, and, in rectifying the systems by com- parison with their pyramid standards, have
... been enabled to relegate into oblivion the awkward number of 27. 34375 arti- ficial grains with which the avoirdupois table now opens, and substitute therefor the simple number 30.
These numbers (24, 20, and 30) result from the very nature of things, and are manifestly of "great importance in conven- iently continuing the final subdivisions down through halves, quarters, thirds, etc. , to the very terminals demanded by the arts, trades, and professions specially concerned with the use of each several subdivision of the general pyramid, earth-com- mensuric, or Anglo-Saxon systems.


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