92 PRESCRIPTION WRITING 



The equivalent of Gr.l is Gm. .06. In order to determine 

 the equivalent of fractions of a grain in grams, we divide .06 

 by the denominator and multiply the result by the numerator 

 of the fraction of a grain. For example : 



Gr. I = § of .06 Gm.; as .06 Gm. = Gr. i., then 



3) .06 (.02 X « = .04. Therefore, Gr. | = .04 Gm. 

 6 







Again: to find the equivalent of Gr.^ in Gm. 



8) .066 (.008 X 1 = .008 

 64 



2 

 Therefore, Gr.J = .008 Gm. 



We stated that 3 i. = 4 Gm. It follows that § i. would 

 equal 32 Gm. As a fact, 3 i. apothecaries' weight, is equiva- 

 lent to a trifle less than Gm. 4.; and an ounce, apothecaries' 

 weight, is usually considered equal to 30 Gm. (exactly 31.10 

 Gm.) for the sake of convenience. A fluid ounce in wine 

 measure is precisely equivalent to 29.57 Cc. We have here 

 another reason why both solid and fluid ounces should be 

 valued at 30 Gm. or Cc. Although it is the custom to regard 

 the minim of liquid as the equivalent of one grain, it is 

 inexact. An apothecaries' ounce weighs 480 Gr.; a fluid ounce 

 of wine measure weighs 457 Gr. Multiple^ of grams or cubic 

 centimeters may be designated as such, instead of using the 

 technical terms. It is perfectly proper to speak of 100 Gm. 

 as one hundred grams, although technically equal to a 

 hectogram. .1 Gm. may be called one-tenth gram, although 

 technically a decigram. Similar remarks apply to Cc, yet 

 1,C00 Cc. (approximately 1 quart) equal one liter, and this 

 term is in common use. 



TABLE OF WEIGHT. — 



{Milligram 

 Centigram 

 Decigram 

 Unit Gram 



{Decagram 

 Hectogram 

 Kilogram 



