J 8 PUBLIC HEALTH CHEMISTRY 



Length. 

 i mm. (millimetre) = ^ of an inch, 

 i cm. (centimetre) = f of an inch, 

 i inch = 25*4 millimetres or 2 J centimetres. 



Mass. 



1 mgr. (milligramme) = 0-01543 grain (or approx. fc gr.). 



rgrm. (gramme) = i5'4323 grains. 



1 kgr. (* kilo " or kilogramme) = 2 lb. 3 \ oz. avoirdupois. 



1 pound avoirdupois = 453'592 grammes. 



1 ounce avoirdupois = 28-35 grammes. 



1 grain = 0*0648 gramme or 64*8 milligrammes. 



Capacity. 



1 centimil = 0*17 minims (approx.) imperial measure. 



1 decimil = 1*7 minims (approx.) imperial measure. 



1 c.c. (cubic centimetre) (or 1 mil) = 16*9 minims, imperial 



1 '-'' measure. ; 



1 L. (litre) =35-196 fluid ounces (35 fl. oz., 1 fl. dr., 

 34 min.), imperial measure. 



1 fl. ounce, imperial measure = 28-42 cubic centimetres 



i pint, imperial measure = 568-34 cubic centimetres. 



1 gallon, imperial measure = 4*546 litres, or 10 lb. avoir- 

 dupois of pure water at 62 F., and under an atmos- 

 pheric pressure of 30 inches of mercury. 



