REVIEW. 
81 
bum is abstracted, and all effects of it at the same time. I 
found this, however, by placing my hand upon the spot where 
it had been, and by testing it with a thermometer, not to be 
correct ; and I further demonstrated its fallacy by direct experi- 
ment. 
I feel convinced that hot shoeing, practised even in the most 
rational manner, dries up the inferior border of the hoof, and 
occasions separation between the wall and the crust. This 
is an opinion founded upon anatomico-physiological reason- 
ing and practical observations, which I might make known 
in justification of it. The crust and sole have been said to be 
simply joined together, and in a manner soldered by horny 
matter. I do not quite coincide with this opinion. Observa- 
tion has shewn me that these two parts made but one continu- 
ous whole, and were not contiguous, and that this entirety was 
affected through a particular cogging or dove-tailing of the 
horny canals of the sole, and of the extremities of the podo- 
phillous with the keraphillous laminse, an arrangement which 
gives at once both solidity and elasticity to the entire circum- 
ference of the hoof. 
Now, it is my belief that, independently of too narrow or too 
heavy shoes, with the insertion of large nails, having a tend- 
ency to provoke separation between crust and sole, hot 
shoeing contributes to produce the same effect; seeing that the 
caloric introduced at each shoeing into the horny canals, at the 
place of reunion of the sole and crust, little by little alters the 
keratogeneous organs inclosed within these canals, diminishing 
their secretion and drying up the horn, and thus bringing about, 
by degrees, the separation in question. 
I likewise believe that the frequent additions which take 
place, on the one part, between the villo-papillary tissue and the 
sole, and, on the other part, between the podophillous and 
keraphillous tissue around the inferior border of the coffin 
bone, and particularly at the toe, are caused, in numerous 
cases, by the repeated slight cauterizations which the kerato- 
geneous organs receive either from the shoe or from the hot 
pincers. 
I am also of opinion that the dryness of the inferior border of 
the crust is connected, among other causes, with hot shoeing. 
Such are M. Delafond’s opinions of fitting shoes hot — or hot 
shoeing, as we have laconically denominated it, as contradistin- 
guished from fitting shoes cold or cold shoeing — elucidated, as 
these opinions have been, by careful microscopic researches into 
