VOL. XXIII.] PHILOSOPHICAL TRANSACTIONS. 43 



and died after a few days indisposition. On opening the thorax, I found the 

 lungs adhering to the pleura of the left side, in such manner that they could 

 not be separated without laceration. A portion of one of the left lobes of the 

 lungs, being cut off, sunk in water; from which part it was likely the matter 

 came, which she formerly coughed up, though the ulcer was then closed, and 

 no appearance of matter was to be seen in that or any other part of the lungs. 

 The lymphatic glands, at the divarication of the windpipe, had by their intu- 

 mescence so compressed the canal of the left side, that it wanted more than 

 two-thirds of its proper passage for the air. 



In these, and some other instances which I could produce, it is evident, that 

 considerable parts of the lungs may be obstructed, and yet the person survive : 

 but Mrs. Terry's case demonstrates the possibility of their recovery, when part 

 of their lungs is totally obstructed, as must happen in such large abscesses. 

 But how the remaining sound parts of such diseased lungs become capable of 

 transmitting the whole mass of blood from the right ventricle of the heart to 

 the left, in equal time and quantity with the blood that circulates in the rest pf 

 the parts, seems not easy to account for. Since I had often found water, in- 

 jected by the arteria pulmonalis, return readily from the lungs again by the vena 

 pulmonalis, I was tempted to try if melted wax, when very hot, would not do 

 the like; which accordingly succeeded in the lungs of two young cats; for after 

 injecting the wax, mixed with oil of turpentine, and tinged with verraillion, by 

 the arteria pulrhonalis, I found it had filled the pulmonic vein with the left 

 auricle, insomuch that some of the wax had reached the left ventricle of the 

 heart ; some of the wax was extravasated, and came into the bronchia and 

 windpipe at the same time. 



In preparing a human heart, by filling its ventricles, auricles, and trunks of 

 its large blood-vessels with wax, I found, on injecting the pulmonic arteries 

 and veins with wax differently tinged, that the wax passed from the veins to the 

 arteries without coming into the bronchia, or being extravasated, though the wax 

 was not injected with near so much force as it might have been. I was never able 

 to make wax pass from the arteries to the veins in human bodies, or quadrupeds, 

 unless in their lungs as above noted, and the spleen and penis; nor did it hap- 

 pen in those parts except when the wax was impelled with great force, though 

 I have constantly observed the communication of arteries and veins of the 

 spleen and penis more open than in other parts, except the lungs. I wish Dr. 

 Morland had told us* in what part of the human body Dr. Areskin had made 

 wax pass from the arteries to the veins, so as to demonstrate their continuation 



• PbUoaophical Transactions, N° 283. — Orig. 

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