VOL. IV.] PHILOSOPHICAL TRANSACTIONS. 3&1 



that of the time of this author's visiting London, and there exposing his MS. 

 That done, it will easily appear which party has the priority in the explication 

 of this doctrine of the air : where it must not pass unnoticed, that Mr. Sin- 

 clair, when he was in London, in his visits to Mr. Boyle discoursed much with 

 him on that subject, and by his own acknowledgment, then made to that gen- 

 tleman, received much light from him concerning it. Secondly, We shall 

 take notice, that it is so great a mistake, that this author commended his 

 manuscript to the judgment of the Royal Society, that it is not so much as 

 mentioned any where in their register-book that such papers came ever before 

 them, which yet is their constant and careful practice to do of all things of that 

 nature ; to which we must add, that the person with whom he left those papers 

 of his. Sir Robert Moray, perhaps with a desire to recommend them to that 

 illustrious body, affirms, that he did not at all judge them proper to be exhi- 

 bited there, because they seemed to him to contain nothing new or extraordinary. 



n. Observationes Medicae, M. Leyser, &c. 8vo. There is nothing in these 

 observations worthy of notice. 



IIL Ottonis Tachenii Hippocrates Chymicus. Venetiis, in 12mo. In this 

 book we have an account of the chemical opinions of Hippocrates, certainly of 

 no use in the modern improved state of chemical science. 



IV. Th. Bartholin! Dissertatio de Cygni Anatome, nunc aucta a Casp. Bar- 

 tholino, F. Hafniae, 8vo. 1668. 



In this discourse the author chiefly observes Ifce wonderful internal fabric of 

 this stately bird (the swan), and more especially the admirable structure of its 

 wind-pipe ; which is so framed, that together with the oesophagus it reaches 

 down to the sternum, into which, as a safe case, it winds itself, and being gone 

 down to the bottom of that cavity is turned up again, and gets out of the 

 straits of the sternum, and climbing up the intermediate clavicles, on which 

 it leans as on a base, it bends to the thorax. But before it comes to the tho- 

 rax and the lungs, it forms a kind of larynx with an os hyoides, covered with 

 a large membrane, and resembling a musical pipe, wide above, but with a nar- 

 row slit, and strait and depressed below. Under which larynx, before the 

 wind-pipe enters into the lungs, it is divaricated into two branches, like 

 bronchia, thicker in the middle, but narrower where they are near the lungs r 

 in which particular it differs from the human arteria aspera, which, it is true,, 

 is also divided into branches, but not before it enters the lungs. 



After this description of the structure of this organ, he considers the fkness 

 of its contrivance for such ^ respiration as was requisite for an animal that 

 by long diving and sinking its neck to the bottom of waters was to find its food. 



V. ^gidii Strauchii Breviarium Chronologicum. Witebergae, in 12mo. 



