[ 3 00 ] 
Cj The head, which is to be in the cavity of this 
organ, together with its wide openings. 
-Z), The dyle or found of this canula. 
Fig. a. - 
The fame canula improved, inafmuch as its end B , 
which I name introdudJor y is fcrew’d on the canula 
A at C, and is unfcrew’d by means of the ftru&ure of 
this introdudlor. 
Fig- 3- 
The introduflor feparated from the canula. 
A A wire or rod of Heel, which fupports the end of 
the introdudtor, and ferves to unfcrew it from the 
canula. 
B y The extremity of the introduflor, which ought 
to be made of diver. 
CC } Elaftic Heel plates or blades. Thefe plates have 
on the in fide of their edge a female fcrew, which 
enters on a male fcrew of the outHde of the end 
of the canula. Their fpringinefs makes them 
feparate when the introdudtor is mounted on the 
canula j and by this widening afunder they leave 
the openings or eyes of d y d. Fig. 1,2. But when 
they are unfcrew’d, they clofe together, as appears 
in Fig. 3, whereby this end becomes flender enough 
to pafs thro’ the canula, thro’ which this part of 
the indrument is drawn out, when the canula is 
placed in Htuation ; which is the intent of this 
drucdure ; for, by this means the outlet becomes 
larger, and the excrefcences cannot be fretted. 
p ig. 4- 
The canula dripp’d of the part above defcribed. 
A, Its funnel or tube and wide draight oridce: wherein 
condfts 
