VOL. XLVII.] PHILOSOPHICAL TRANSACTIONS. 217 



ceps ; and which might at the same time be able to cut these inaccessible excres- 

 cences, or the greatest part of them at least ; the remains of which being cut 

 open, would thereby acquire the necessary dispositions to suppurate, which are 

 indicated for the cure. For this purpose it was, that about that time he con- 

 trived the cutting forceps or scissars, fig. 10, pi. 6, to cut the excrescences of 

 the bladder or uterus, which are inaccessible to the fingers, a is the bend of 

 this instrument on the flat of its blades. B, buttons, which terminate each blade, 

 and are at some little distance from each other, even when the blades are closed 

 together ; that these ends might neither prick nor pinch the coats of the bladder. 

 Fig. 6, is the new canula. a, the neck, which is to be embraced by the neck 

 of the bladder, b, the swelling, which is to be within the neck of the bladder. 



c, the head, which is to be in the cavity of this organ, together with its wide 

 openings, d, the style or sound of this canula. 



Fig. 7, the same canula improved, as its end b, which M. le Cat names in- 

 troductor, is screwed on the canula a at c, and is unscrewed by means of the 

 structure of this introductor. 



Fig. 8, The introductor separated from the canula. a, a wire or rod of steel, 

 which supports the end of the introductor, and ser\'es to unscrew it from the 

 canula. b, the extremity of the introductor, which ought to be made of silver, 

 cc, elastic steel plates or blades. These plates have on the inside of their edge a 

 female screw, which enters on a male screw of the outside of the end of the ca- 

 nula. Their springiness makes' them separate when the introductor is mounted 

 on the canula ; and by this widening asunder they leave the openings or eyes of 



d, d, fig. 6, 7. But when they are unscrewed, they close together, as appears 

 in fig. 8, whereby this end becomes slender enough to pass through the canula, 

 through which this part of the instrument is drawn out, when the canula is placed 

 in its situation ; which is the intent of this structure ; for by this means the outlet 

 becomes larger, and the excrescences cannot be fretted. 



Fig. 9. The canula stripped of the part above described, a, its funnel or tube 

 and wide straight orifice ; in which consists the improvement of this last canula, 

 which he had principally in view in the rectification of the first. 



XLFI. An Account of the Chmamon-tree.* By W. Watson, F.R.S. p. 301. 

 Mr. W. laid before the r. s. a specimen of the bark and wood of the cinnamon- 

 tree, nearly of the length and size of an ordinary walking-cane, transmitted from 

 Mr. Benjamin Robins, in India, to Dr. Letherland. And in order to convey to 

 thern at the same time a yet more perfect idea of the tree itself Mr. W. sent 

 with it a small branch of this valuable plant from his own hortus siccus. 



* Lauras Cinnamonmm, Liiir. 

 VOL. X. F K 



