Io : A COMPENDIUM OF 
TO CONVERT CENTIGRAMS INTO GRAINS. 
Divide the number of centigrams, by 6, the 
number of centigrams that is assumed to equal 
I grain, 
Example: 15 centigrams divided by 6, equals 2.5 
grains. 
To insure greater accuracy,deduct 3 per cent, 
which taken from 2.5 will leave 2.42 grains. 
The true equivalent is 2.31 grains, 
TO CONVERT GRAINS INTO CENTIGRAMS, 
Multiply the number of grains by Io, and 
from the result subtract one-third. 
Example: 5 grains multiplied by 10 equals 50; after 
deducting one-third will leave 33.34 as the number of 
centigrams equal 5 grains. 
If greater accuracy is desired, deduct 3 per 
cent; 33.34 less 3 per cent will equal 32.33. 
The true equivalent is 32.39, 
TO CONVERT FLUID OUNCES INTO MILLILITERS OR 
CUBIC CENTIMETERS, 
Multiply the number of ounces by 32, the 
assumed number of milliliters or cubic centi- 
meters in 1 fluid ounce. 
Example: 2 fluid ounces multiplied by 32, equals 64 
milliliters or cubic centimeters, 
If greater accuracy is desired, from this result 
deduct 8 per cent; 64 less 8 per cent equals 
58.88. The true equivalent is 59.10 milliliters 
or cubic centimeters, 
TO CONVERT MILLILITERS OR CUBIC CENTIMETERS 
INTO FLUID OUNCES, 
Divide the number o 
5 . f milliliters or cubic cen- 
timeters by 32, 
