WKIGilTB AND MKASURES. 49 



PRESCRIPTIOXS, 



In writing? proscriptions, Roman iniincrals are used instead of 

 Arabic (ordinary figures) and tiie numerals follfiw the symbols, 

 thus: 5 vii for 7 drams; f 5 xii for 12 fluid drams, etc. S. S. signifies 

 one half, thus: 5 ii s. s. for 2^ drams. 



FIELD EXPEDIENTS. 



In garrison, doses must be accurately measured by scales or 

 graduates, according to the tables of dry or hcjuid measure, but 

 in the field the following rough expedients may be used: 



Dry mcasxrc. 



(1 Dunce of lead acetate. 



All ordnance spcKui h "unce of zinc sulphate. 



( Heapinfj full.) )- <lrams of a powder. 



1 1 ounce of a salt. 



( >rdnance l in cuj) | of a quart. 



Full day's ration of medium-weight oats. 14 cups. 



Liquid mrnmn-r. 



A drop 1 minim. 



A leaspoonful *- ] fluid dram. 



A tablespoonful J fluid ounce. 



Xhi cup 28 ounces= J of » quart. 



V "\ 



