622 MEDICINES. 



2 drachms ; hack, 1^ drachms ; and pony, 1 drachm. This solu- 

 tion will keep good for any length of time. Ordinary solutions 

 of eserine become quickly altered in composition. Opium or 

 morphine should not be giyen at the same time as eserine, for 

 their action is antagonistic to it. 



Ether, Nitrous Spirit of. 



See "Nitre, Sweet Spirits of" (p. 633). 



Formalin 



is a 40 per cent, solution of formic aldehyde. It is used chiefly 

 as a disinfectant (1 per cent, solution), and has proved beneficial as 

 an antiseptic in navel-ill (p. 516). Percentages quoted are those 

 of formic aldehyde, and not of formalin. 

 Solutions are made as follows: — 



10 p.c. solution, add 1 part of formalin to 3 of water. 



" V-^- " )' )> V * » 



^ P-'^- !) » » >; ' » 



^ P'C- !> )i ?> » " )J 



2 p.c. „ „ „ „ 19 „ 



1 p.c. ,, ., „ „ 39 „ 



Formalin was largely used as a disinfectant, in the form of 

 spray, during the outbreak of plague at Capetown in 1901. 



Gentian 



is an excellent stomachic. The extract, of which J oz. may be 

 given, is the most convenient form to use. Or give from ^ to 1 

 oz. of the powder in 1^ pints of ale or stout with 1 oz. of sweet 

 spirits of nitre. 



Goulard's Extract 



is the popular name sometimes applied to the liquor plunibi 

 suhacetatis of druggists. 



For cracked heels, mud fever, etc., use 1 part of the solution to 

 4 parts of olive oil, cream, or glycerine. 



Ichthyol, 



which is the ichthyo-sulphate of ammonium or of sodium, has been 

 greatly praised by German veterinary surgeons, as a remedj' for 

 cracked heels, grease, mallenders, sallenders, wounds, burns, saddle 



