° 
BOTANIC MATERIA MEDICA, 9 
METRIC SYSTEM OF WEIGHTS AND 
MEASURES. 
To assist pharamacists who are not conver- 
sant or familiar with this system the following 
rules, with some slight modifications, have been 
taken from Prof. Oldberg’s manual of weights 
and measures: 
TO CONVERT GRAMS INTO APOTHECARIES OUNCES, 
Divide the number of grams by 32, the num- 
ber of grams that is assumed to equal 1 ounce. 
Example: 1oo grams divided by 32 equals 3 ounces 
and 1 drachm, or 1500 grains. 
To insure greater accuracy, add 3 per cent, 
which for 1500 grains will be 45, which will 
_ make the result 1545 grains or 3 ounces, I 
drachm and 45 grains. The true equivalent is 
ee 1543.23 grains, 
TO CONVERT APOTHECARIES’ OUNCES INTO GRAMS. 
Multiply the number of ounces. by 32, the 
number that is assumed to equal 1 ounce. 
Example: 1 ounce multiplied by 32, equals 32 grams, 
To insure greater accuracy,deduct 3 percent, 
: : : which taken from 32 will leave 31.04 grams. 
_ The true equivalent is 31. 10. : 
