METHOD OF EXAMINING THE FOOT 15 
Cocaine being an irritant, it must be remembered that 
after the anesthesia the lameness is somewhat more marked 
than before. 
To the cocaine other practitioners add morphia in the 
following proportions : 
Cocaine hydrochlorate ... ... 24 grains. 
Morphia ... o8 se Wen dae 45 
Aqua destil, $b or ... 14 drams. 
As a diagnostic this mixture of the two is said to be far 
superior to either cocaine or morphia alone. 
In connection with this subject, Professor Hobday has 
published, among others, the following cases illustrating 
the practical value of this method of diagnosis :* 
Case I.—Cab gelding. Seat of lameness somewhat 
obscure ; navicular disease suspected. Injected 2 grains 
of cocaine in aqueous solution on either side of the limb, 
immediately over the metacarpal nerves. 
Five Minutes——Lameness perceptibly diminished. 
Ten Minutes.—Lameness scarcely perceptible. 
Casz II.—Mare. Obscure lameness; foot suspected. 
Injected 30 minims of a 5 per cent. solution on either side 
of the leg just above the fetlock. 
Ten Minutes.—No lameness, thus proving that the seat 
of lameness was below the point of injection. 
Casz JII.—Cab gelding, aged, free clinique; Messrs. 
Elme’s and Moffat’s case. Obscure lameness; foot sus- 
pected of navicular disease; very lame. Injected 30 
minims of a 5 per cent. solution of cocaine on either side 
of the leg over the metacarpal nerves. 
Six Minutes.—Lameness perceptibly less; there was no 
response whatever on the inside of the leg to the prick 
of a pin. On the outside, which had not been injected so 
thoroughly, there was sensation, although not so much as 
in a healthy foot. 
Ten Minutes—Lameness had almost disappeared; so 
* The Journal of Comparative Pathology and Therapeutics 
vol. viii., pp. 27, 48. 
