VOL. XV.] FHILOSOVHICAL TRANSACTIONS. IQS 



the algebraic art, as it then was. In the history, Dr. Wallis describes, though 

 in a very brief manner, the methods and works of some of the principal authors 

 on this art. Then, in the practical part, he illustrates each author's method, 

 by many pertinent examples, adding also many other things of his own, of con- 

 siderable ingenuity and importance. 



Apologia pro Circuitione Sanguinis ; qua respondetur JEmylio Parisano, Medico 

 F^enetOj Authore Georgia Entio ; Editio altera, auctior et accuratior. Land. 

 l685, 8vo. N° 173, p. 1105. 



A 2d edition of the learned author's defence of the circulation of the blood. 

 In this epistle to Dr. Harvey, he shows how little truth there is in Father Paul's 

 being the inventor of the circulation ; forasmuch as the papers written by him 

 on this subject, and found in his study after his death, were no more than notes 

 taken at the reading of Dr. Harvey's book, which was lent him by a country- 

 man of his lately returned to Venice from England, where he had been am- 

 bassador from that state;* and was presented by the author with one of these 

 books; the truth of which appears from a letter written by Father Fulgentio 

 to Dr. Harvey, expressing as much. 



An Answer to some Queries proposed by Mr. William Molyneux, concerning 

 Lough-Neagh. By Mr. Edward Smyth, F. of Trin. Col. Dublin. N° 174, 

 p. 1108. 



1. Whether Lough-Neagh has really the quality of petrifying wood? To this 

 I answer, that no experiment is yet known, to prove the lough has this petrifying 

 quality; or that the water any way promotes the petrification ; but rather that two 

 experiments made by a gentleman of worth and good credit, whose estate lies 

 contiguous to the lough, prove the contrary. For about 19 years ago, he sluck 

 two holly stakes in two several places of the lough, near that place where the 

 upper band enters into it; and that part of the stake, which for so long time 

 has been washed by the water, remains there without any alteration, or the 

 least advance towards petrification; as for that part of the stake which is covered 

 by the mud or earth, he has not yet looked on it, but promises to do it this 

 summer, -|- taking advantage of the fall of the lough. 



1. Whether this quality be equally diffused throughout the whole lough, or 

 be more strong in any particular parts thereof? Because there have been no cer- 



• This circumstance has been before noticed in the abstract from Dr. Clarck's letter, inserted in 

 volume 1, pp. 247, 248 of this Abridgment. 



-)- This experiment is inconckisive, as the whole of the stake was not examined. 



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