132 Ofthe GLANDERS. 



The inftrument called the trephine ^ 

 which is chiefly ufed by our Englifli fur- 

 geons in perforating the fl<:ull, will equal- 

 ly anfwer this purpofe ; and if any diffi- 

 culties fhould arife, notwithftanding this 

 defcription, the gentlemen of the faculty 

 will foon make it familiar and intelli- 



gible. 



Before the application of the trepan, 

 or trephine, it is quite necefTary to ob- 

 ferve, that a circular piece of the fkin 

 Ihould firft be cut off, with the mem- 

 brane which covers the bone, about the 

 fize of a half-crown piece •, in order to 

 make the inftrument work the eafier, and 

 to prevent the inconveniencies which might 

 arife from the external wound's healing up 

 too fad. 



The fyringe fliould be large enough to 

 contain half a pint of injedion. 



CHAP. 



