“His knowledge was of so vast an extent, that were it not for the variety of vouchers in their several sort, I should be afraid to say all I know. He carried the study of Hebrew very far into the Rabbinical writings and the other Oriental languages. He had read so much out of the Fathers, that he had formed out of it a clear judgment of all the eminent ones. He had read a vast deal on the Scriptures, and had gone very nicely through the whole controversies on religion, and was a true master of the whole body of divinity. He read the whole compass of the mathematical sciences; and though he did not set himself to spring any new game, yet he knew even the abstrusest parts of geometry. Geography, in the several parts of it that related to navigation or travelling, history, and books of travels, were his diversions. He went very nicely through all the parts of physic; only the tenderness of his nature made him less able to endure the exactness of anatomical dissections, especially of living animals, though he knew them to be most instructive. But for the history of nature, ancient or modern, of the productions of all countries, of the virtues and improvements of plants, of ores and minerals, and all the varieties that are in them in different climates, he was by much, by very much, the readiest and perfectest I ever knew, in the greatest compass, and with the truest exactness. This put him in the way of making that vast variety of experiments, beyond any man, as far as we know, that ever lived. And in these, as he made a great progress in new discoveries, so he used so nice a strictness, and delivered them with so scrupulous a truth, that all who have examined them, may find how safely the world may depend upon them. But his peculiar and favourite study was chemistry, in which he engaged with none of those ravenous and ambitious designs that draw many into them. His design was only to find out Nature, to see into what principles things might be resolved, and of what they were compounded, and to prepare good medicaments for the bodies of men. He spent neither his time nor his fortune upon the vain pursuits of high promises and pretensions. He always kept himself within the compass that his estate might well bear. And as he made chemistry much the better for his dealing with it, so he never made himself either the worse, or the poorer for it.” It would be easy to multiply testimonies of the high reputation in which Boyle was held: indeed the reader will find numerous instances collected in the article Boyle, in Dr. Kippis’s Biographia Britannica, the perusal of which will amply gratify the reader’s curiosity. Still more detailed accounts of Boyle’s life and character will be found in other works to which we have already referred, especially in Dr. Birch’s Life. [Illustration: Air-Pump.] [Illustration: _Engraved by E. Scriven._ SIR ISAAC NEWTON. _From the original Picture by Vanderbank in the possession of the Royal Society._