

Weighing and Measuring 



Avoirdupois Weight. 



16 drachms......... =
16 ounces ... ... ... =
I lb. = 16 ozs. = 256 drms. = 7,000 grs. by all (dealers for retailing chemicals, etc.
Liquid Measure. 60 minims ... ... ... =
8 drachms ... ... ... =
20 ounces ... ,.. ... =
8 pints ......... = 
i ounce, i pound.
(This weight is used I oz. = 4375 grs.).




1 gal. (Cj) = 8 pts. (Oviij) = 160 ozs. (f. 3, 160) = 1,280 fluid drachms (f. 5, 1,280).
The following is a synopsis of the Metric System of weights and measures :  



Lineal Measure. 



1,000 millimetres ioo centimetres 10 decimetres 10 metres ioo .. 1,000 ,, 
1 metre.
1 M
1 r,
1 decametre.
1 hectometre.
1 kilometre. 



The metre is the unit, and is equal to 3937 English inches, and was intended to be equal to a 40millionth part of a meridian circle.
Liquid Measure. 



1,000 millilitres 100 centilitres 10 decilitres 10 litres 100 .. 1,000 ,,
The litre is the unit, and is equal to 35216 fluid 
1 litre.
1 M 1 M
1 decalitre. 1 hectolitre 1 kilolitre.
Liquid 





measures are often expressed, however, as cubic centimetres, or ccm.; = i6'8 minims: but as the statutory measure is now the very slightly different millilitre it is better when practicable to adopt this (see Cubic Centimetre).
648 


