620 MEDICINES. 



its sensibility to such an extent that it can be handled freely with- 

 out causing discomfort to the animal. Use a solution of the hydro- 

 chlorate of cocaine of double that strength (say, 10 grains in 100 

 minims of water) for hypodermic injections (p. 644:) to deaden the 

 feeling of a part. For the temporary removal of lameness below 

 the fetlock, or for finding if lameness is due to pain above or 

 below that part, use a subcutaneous injection of cocaine on the 

 outside and on the inside of the leg, just above the fetlock, at the 

 spot usually chosen for the high operation of plantar neurotomy 

 (p. 681) ; each injection consisting of 2 grains of the hydrochlorate 

 of cocaine dissolved in 40 minims of distilled water, with a little 

 bicarbonate of soda to neutralise it. The action of the cocaine is 

 increased by heating the solution to about 85° F. The amount 

 of cocaine in each injection might be safely increased to 3 grains. 

 After these injections, the lameness disappears in about ten 

 minutes, and returns in about half an hour. For the temporary 

 relief of a case of painful cracked heels, it is well to use a solution 

 of 5 grains of the hydrochlorate in 20 drops of oil of cloves. 



Some Continental veterinary surgeons speak highly of morphia 

 combined with cocaine for deadening pain in foot diseases, for even 

 a week or longer. The following subcutaneous injection, which 

 produces its effect in from 5 to 10 minutes, may be made on each 

 side of the plantar nerve (p. 681) : — 



Hydrochlorate of cocaine ... ... 2^ grains. 



Morphia ... ... ... ... 1^ grains. 



Distilled water ... ... ... ... 1 5 drachms. 



Cotton Wool, Antiseptic, 



is prepared by impregnating cotton-wool with various emtiseptics 

 (boric acid, iodoform, ooirrosive sublimate, etc.), so that layers of 

 such material placed over a wound will protect the part from the 

 entrance of bacteria (p. 63). The same remark applies to wood 

 wool, and antiseptic gauze. These protective agents can .be ob- 

 tained from any large chemist. 



Creolin 



is a ooal-tar product from which carbolic acid is excluded. It 

 readily dissolves in water, with which it forms a milky solution. 

 It is much less poisonous (whether taken by the mouth or absorbed 

 by the skin) and less irritating to the skin or to broken surfaces 

 than carbolic acid, and is an equally effective antiseptic. ^ oz. of 

 it might be given internally. Escternally, it may be used pure 



