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CHAPTER XXVII. 



Veterinary Medicines. 



Weights. 



The official scale of weights for medicines is as follows : — 



1 ounce = 487J grains. 

 16 ounces = 1 lb. = 7,000 grains. 



For convenience sake, and in deference to former custom, it is 

 usual to accept 60 grains as equal to 1 drachm, and 8 drachms 

 equal to 1 ounce. 



Approximate Weights. 



A threepenny piece = ... ... ... 20 grains. 



A sixpenny piece := ... ... ... 40 ,, 



A threepenny piece and a sixpenny 



piece = ... ... ... ... 60 ,, 



(1 drachm.) 



A shilling piece = ... ... ... 80 grains. 



3^ sovereigns = ... ... ... 1 ounce. 



Three penny pieces and a threepenny 



piece = ... ... ... ... 1 J, 



Two rupees and eight annas in silver weigh a little more than 

 an ounce. 



Measures. 



60 minims = ... ... ... 1 fluid drachm. 



8 fluid drachms = ... ... ... 1 fluid ounce. 



20 fluid ounces = ... ... ... 1 pint. 



8 pints = ... ... ... 1 gallon. 



Roughly speaking, a minim may be considered equal to a drop, 

 which, however, varies in size according to the nature of the fluid, 

 and the shape of the portion of the vessel from which it is poured. 



