314 PHILOSOPHICAL TRANSACTIONS. [aNNO 1 706. 



thus a cure was accomplished. In making the incision, the author cautions 

 the operator to divide and draw aside carefully the sterno-hyoides and sterno- 

 ihyreoides muscles. He says he had seen a small branch of the ductus 

 thoracicus sive chyliferus going to the pericardium, and that by introducing 

 a pipe and blowing through it, he was enabled to inflate the pericardium ; 

 he therefore conjectured that the lymph in the pericardium was derived 

 from this source. He compares the shape of the human lungs to a cow's 

 hoof, &c. The pericardium, in this subject, adhered preternatu rally to the 

 diaj)hragm. — There are two glands seated below the larynx under the sterno- 

 thyreoidean muscles, one on each side of the trachea. In the bronchocele 

 these glands become surprisingly enlarged. He observed that the thoracic duct 

 sends off a sm^ll brancli to the parotid gland, — In performing the operation of 

 trepanning, he admonishes surgeons to avoid the sutures of the cranium, lest 

 the dura mater should be wounded; the consequence of which (he says) might 

 be fatal convulsions. The human brain is large, in proportion to the rest of 

 the body. The brain does not pulsate per se, but by means of the arteries. 

 For if the cranium of a live animal be opened, and the brain denuded, removing 

 from one side or hemisphere the pia mater with its vessels ; the side thus 

 stripped of its membrane will not pulsate, but the other side will. He said 

 that he had made this experiment himself, and that he had seen the brain pul- 

 sate for the space of a quarter of an hour and more, after the separation of the 

 cranium.* — The glandula pituitaria is larger and firmer in men than in brutes — » 

 Under the membrane of the in^undibulum he showed 2 corpuscula alba of the 

 size of a vetch, and of the shape of a testicle, which he says were first dis- 

 covered by his brother.-^- 



We saw the operation of cutting a child out of the womb, performed on a 

 dead body by Marchetti the younger: this is called partus Caesareus, the 

 Caesarean operation. 



'^^■ He told us that himself had taken a child out of the mother's womb, after 

 she was dead, which lived 2 or 3 days. Then follows an account of the manner 

 in which this operation was performed, a detail of which it would be super- 

 fluous to insert here, seeing that this operation is fully and circumstantially de- 

 scribed in numerous treatises on surgery. 



In a hare dissected we observed the intestinum rectum of a very great length, 

 having large pilulse of dung secundum intervalla. I call here the gut (so far as 

 it had no cellulas) rectum, though indeed it had one or two convolutions. 



, * Concerning the pulsatory movement of the brain, see vol. v, p. 71, of these Abridgments. 

 ^ "t It is remarked, however, by Mr. Ray, that these corpuscula alba are figured in Vesling^. 



