304 Notices respscling New Books, 



sary to its motion ; which might have been the case had it been 

 otherwise constructed. It has been imagined, that the foot, after 

 this operation, would become a mere block, and that the animal 

 would be rendered dangerous to ride or to drive. On making 

 close observations on this point, 1 am glad to find that it exists 

 only in the imagination, as horses that we have now at work, 

 who have undergone the operation nearly two years, are con- 

 sidered quite as effective, in every respect, as those which have 

 not required it. It has also been stated, that the hoof and foot 

 w-iste after the operation ; but I am glad to know that this ob- 

 servation is imaginary also. 1 have observed in hoofs where the 

 operation has been performed a more plentiful production of 

 horn than before, and a greater disposition to grow in the natu- 

 ral form ; and I think this is a consequence to be expected, as 

 the irritable state of the foot being destroyed by the divi^on of 

 the nerve, the secretion is more likely to go on freely. When the 

 operation has been performed before any considerable change of 

 structure has taken place, I have no doubt that the original ciuse 

 is in time removed altogether, by the animal being enabled to 

 bear the full proportion of weight on the lame foot ; as I have 

 shown, that if the foot, from any cause, is long kept in a state of 

 relaxation, the horn soon contracts, and tightens on the internal 

 contents, and hence arises the utility of the patten shoe being 

 applied on the sound foot in ca.«es of lameness. 



" It is useful to know that where the nervous influence has 

 been restored, and lameness in some cases has returned, a repe- 

 tition of the operation has been attended with the same advan- 

 tages as in the first instance. 



" The operation itself is very simple. Having first ascertained 

 the course of the artery by the pulsation, an incision is made 

 through the skin, about an inch and a half or two inches in 

 length ; and on removing the cellular substance, the artery, vein, 

 and nerve are all shown running together, the nerve on the inside 

 of the artery and close to it. A needle may be readily passed 

 under it, leaving a thread, which, on pulling'a little, enables the 

 operator to separate the nerve from the artery with ease, and to 

 take out as much as is considered necessary ; after which the 

 skin should be closed with a stitch, which sometimes heals by 

 the first intention ; after which bleeding and physic are useful." 



yf New Geological Map of England and Wales, with the Inland 

 Navigations ; exhibiting the Districts of Coal, and other Sites 

 of Mineral Tonnage. By William Smith, Engineer, IS20 ; 

 on one large sheet, neatly coloured and shaded. Gary, St. 

 James's-street. 



The map before us is of unquestionable utility, and should have 



a place 



