By CORROSION. 37% 
prefenting only a part of the vafcular preparation of a 
kidney by corrofion, {the reft being broke down ina jour- 
ney by land of above a thoufand miles) which was ex- 
prefled by the celebrated Morgagni, illuftrious profeflor 
of anatomy in the univerfity of Padua. He had kept up 
a literary correfpondence with Ruyfch when alive, had 
been favoured with fpecimens of this great man’s prepa- 
rations, and declared that in comparifon to the preparation 
I gave him, they were “ rudis indigeftaque moles.” From 
this fmall fpecimen, he faid, “* ex ungue leonem,”’ he could 
readily comprehend that the ufefulnefs of this kind of 
knowledge amongft the learned in anatomy, muft become 
great and extenfive. 
I mention thefe anecdotes merely to fhow how recent, 
or at leaft how confined the knowledge of this ufeful art 
then was, being limited, as far as I know, to Great-Bri- 
tain only. I fuppofe it to be owing to this circumftance, 
viz. that real practical anatomifts who have excelled in 
their preparations, have too generally kept fecret the me= 
thods and arts they employed in making thofe preparati- 
ons. For this reafon, much I think is due to the me- 
mory of the great Profeflor Monro, of Edinburgh, who 
has publifhed a paper upon the art of making injections. 
_ So far as I can learn, this art cannot be traced farther 
back than to the learned Dr. Nichols of London, who for= 
merly gave le€tures in anatomy both there and at Ox- 
ford, and from whom Dr. Hunter acknowledged to his 
pupils that he received his firft information. He then de- 
ferves to be looked upon as. the author and inventor of 
this art. When Dr. Nichols declined the bufinefs, Dr. 
Hunter and his brother Mr. Hunter, took up the profeffion: 
of anatomy. Without doubt, thofe unrivalled brothers in 
anatomical fkill, made confiderable improvements in the’ 
art of injeCting and difle€ting animal bodies ; and it is like- 
ly improved the compofition of injeCtions for corrofion. 
My 
