Gray's supplement to the pharmacopoeia: being a concise but comprehensive dispensatory and manual of facts and formulae, for the chemist and druggist and medical practitioner / Entirely re-written, re-arranged, and considerably enlarged by Theophilus Redwood.

  • Redwood, Theophilus, 1806-1892.
Date:
1847
Catalogue details

Licence: Public Domain Mark

Credit: Gray's supplement to the pharmacopoeia: being a concise but comprehensive dispensatory and manual of facts and formulae, for the chemist and druggist and medical practitioner / Entirely re-written, re-arranged, and considerably enlarged by Theophilus Redwood. Source: Wellcome Collection.

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    FOREIGN WEIGHTS. FRENCH WEIGHTS.—Previous to the revolution of 1789, the weight called “ poids de marc,” the unit of which was the pound of Charlemagne, was that almost exclusively used in France. This was divided in the following manner :— OLD FRENCH WEIGHT. Equivalents in Equivalents in English troy grains. French grammes. 1 grain 2 . © 0°8203 - 0:0531 24—= 1scrupule - ~ = ° 19°687 - 1°27 4 72== 3= 1 gros or dragme - 59-070 - 3°824 576= 24= 8= 1 once - - 47 2°562 - 50°594 4608=192= 64= 8=1 mare “ 3780 500 ° 244-750 6612=288= 96=12=1 livre medicinal 5670°750 * 367°125 ee ee eee livre marchand pe cae 9216=384=128 =16=1 | or poid demaret 7961000 = 489500 During the progress of the revolution, a new system of weights and measures was introduced by the government, which has been called the decimal or metrical system. According to this system, the ten-millionth part of a quarter of the meridian of the earth is taken as the unit from which all other measures are calculated. This unit is called the métre (from perpor, measure). It is divided into ten parts, each of which is called a decimétre; and this is again divided into ten parts, each of which is called a centimetre. A cubic décimétre is taken as the unit of measures of capacity, and is called a Zitre. A cubic centimétre of distilled water, at its maximum density, that is, ata temperature of 89°5° Fahrenheit, is the unit of weights, and is called a gramme. In the following table the French metrical weights are given, with their equivalents in English troy and avoirdupois weights. care eS Le eM Frencn Merricat Weicr. —* a oe eee — ; FE e a | 3 a 3 e Equivalents a B/e| & é g 3 5 E ve Sroy Avoirdupois | Equivalents Bie] & ro a Ss ss Weight. : = Oleo) i & = = eS, a Weight. | . a ‘EL O S o = = s D : Mar be Bier roy Grains. Sie Ve ee) £3 rH s;N 2] a2 F @ is a - Sim} 4 a 3 = los] mY = 1] Bs GN Be NG os Sara ae 0154 1 10 °154. 1 10 100 1°5 1°5 1°543 I 1). 10 100 1000 15°4 308 15°434 1 10; 100 1000) 10000 2/54 154. 154°340 ; 1} 10 100} 1000 10000} 100000] |3 | 1/43 3 | 230°9 1543°402 — 1} 10/-100] 1000} 10000} 100000] 1v00000} 2/8 | 1/14 2 13 |121°5 43100 1/10} 100/1000} 10000]100000] 1000000 10000000.26/9 | 4:20 22 |0 | 340 154340°234 Several laws have been passed, at different periods, to render the metrical system of weights and measures obligatory through-
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