[ 33 ° ] 
Whereas, in making an incifion on the furface of the 
cryftalline, and wounding its capfula, the cryftal- 
line will frequently flip out of the capfula, which 
will be left behind : And, in fadt, this has happen’d 
to M. Daviel, who advifes pincers, and other inftru- 
ments, in order to extradt the remaining membrane. 
However, I fhall here obferve, in regard to the cap- 
fula of the cryftalline, that, fhould the humour flip 
out of it, before it be feized by the knife, it poflibly 
will wafte ; for, in milky cataradts, when the fluid 
is difeharged, the membrane, in length of time, 
waftes : Whole cataradts, with the inveloping mem- 
brane likewife, fometimes wafte : And in one of my 
patients (A. C.) the cry flail’ ne, from the mere pref- 
fure in the operation, burft out of its capfula, which 
I left in the eye ; but in fome weeks it intirely 
wafted. However, if the removing of the capfula 
fhould, by future experience, be found neceflary, 
it may be conveniently done by the curette ; one 
of the inftruments M. Daviel recommends upon that 
occaflon. This inftrument may be alfo ufed for the 
extraction of a cataradt, which has been broken to 
pieces by the couching needle in a former operation* 
and for the removal of the capfula of bag-cataradt, 
when the fluid only has been difeharged, and the bag 
remains behind ; but it will be molt eminently ufe- 
ful in detaching the cryftalline from the back part 
of the iris, when any portion of it happened to ad- 
here : Which circumftance would render the opera- 
tion fruitlefs, without fuch a precaution. 
It has not happened, in any of the cafes I have 
treated, that, either during the operation, or after 
the operation, the iris has been puftfd forwards, or 
inflnuated 
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