4 1 4 On the Animcil Calculus. 
miniflied, by increafing the perpendicular 
Height ; and confequently the Force of the 
Water which flows thro* the Catheter^ as al- 
io by abating on fuch an Occafion the Quan- 
tity of Drink that is taken in. This fmall Pro- 
portion of Urine to Water may probably 
very little difturb the Effeft of any Liquor, 
that may by this means be made to pafs into 
the Bladder; whether for diflblving of the Cal- 
cuhis^ if any fuch Liquor (hould ever be diF 
covered, or whether it be for any medicinal 
Purpofe to cure any Diforders in the Bladder -y 
in which cafes this Inflirument may poflibly 
be fomecimes of ufe. 
4. But if upon Tryal it be found that 
the Canals of this double Catheter, are 
too fmall, then it may perhaps be a better 
way to pafs any Liquor into the Bladder^ thro* 
a fmall or middle fized common Catheter^ 
thro’ which it would flow more plentifully 
in, and alfo pafs out more freely, between the 
Sphincter and the Catheter y when the Bladder 
is full to a certain Degree, whereby any grofs, 
(limy or farculent Matter would more eafily be 
difeharged from the Bladdery than thro’ the 
narrower PalTage of a double Catheter. 
Exp E Ri- 
