Pinagout 
Tuat the form of this inftrument may be better underftood, 
I have annexed two plates of it; one, of the parts of it fepa- 
rately ; the other, of all thefe parts together, when to be ufed.— 
I am well aware, that in offering this inftrument to the public 1 
may have to combat not only with the prejudice of a great many 
years, but with fome of the moft refpectable authorities in the 
profeflion, who have been long inthe habit of ufing the other 
inftruments with fuccefs; but from the exper ience I have had of 
it myfelf, and from the approbation i it has met with from many 
eminent Surgeons in this city, I am tempted to fend it into the 
world, with a hope that no practitioner will condemn it with- 
out firft having given it a;fair trial ; : if then any alteration fhould 
be fuggefted, to render it more fafe, ufeful and convenient, 
the improvement fhall be thankfully adopted. 
I must obferve, that in the foregoing pages the reader’ will 
find the inftrument called trephine fometimes, wrote trafine. In 
this I have followed the fpelling of the authors I have confulted. 
Trafine, a tribus finibus, was the name it received from the in- 
ventor, John Woodall ; it has fince, for what reafon’I know not, 
been changed to trephine ; but the alteration in the letters of the 
word (the pronunciation being. the fame) is immaterial. 
Vot. IV. T ‘ EXPLA- 
