VOL. XXIV.J PHtLOSOPHICAL TRANSACTIONS. 151 



In Anatomy he has been very particular, giving a large account of all the 

 parts of a human body, both internal and external, with the descriptions of 

 the muscles and bones, in a fair plate, and under such general words as blood, 

 circulation, heart, ear, eye, arteries, veins, bile, lympha, chylification, &c. he 

 has always consulted the best authors. 



In Architecture he has, in a plate, given an explanation of the five orders of 

 pillars, with a full and clear account of the nature and rules of that art, which 

 is to be met with under the several terms thereunto belonging. In Fortifica- 

 tion, besides an explication of the whole art under proper terms, from the best 

 authors in that kind, he has also a new plate with a description annexed, 

 wherein all the parts of a fortified place are clearly seen at one view. He has 

 described the several parts of a ship, both as in the dock when building, and 

 when rigged and under sail at sea: in which he has been very accurate and par- 

 ticular ; for besides the helps of the best dictionaries in that kind, as well as 

 draughts, sections and models, he has often gone aboard himself, to get a 

 more ready and sure knowledge in this matter. 



He has given the laws of motion, both with respect to uniform and acce- 

 lerated motions ; he has determined the laws of the shock of bodies perfectly 

 hard, and those that are elastic, &c. In Gunnery he has given demonstrative 

 rules and methods for shooting in great guns and mortars, from the theorems 

 of the learned Captain Halley, and from Mr. Anderson's tables. He has 

 given us also the doctrine of mechanics and statics ; has determined the laws 

 of projectiles ; and is very large in hydrostatics, giving an account of the nature 

 and properties of fluids, determining them both experimentally and mathema- 

 tically, and has annexed a very accurate table of the specific gravities of dif- 

 ferent bodies, from Mr. Boyle, Mr. Collins, and his own experiments. 



The grand phaenomena of nature he has explained from the best authors; as 

 the law of gravitation from Mr. Newton ; the theory of the tides from 

 Captain Halley, on his principles, &c. And under such general terms as mag- 

 netism, light, colours, elasticity, solidity, divisibility, volatility, firmness, heat, 

 cold, wind, &c. we have what is discovered concerning the nature and proper- 

 ties of those qualities from experiments and observation. 



The phaenomena of the rainbow or iris, he has accounted for, from the 

 learned and ingenious Captain Halley. He has given an account of snow from 

 Dr. Grew, and one of ice from the French. 



As to sound, he has collected all he could meet with; but he hints, that that 

 quality is not sufficiently understood, and wishes it were a little better considered. 

 He is very full in his explication of the phaenomena and properties of the air 

 and atmosphere, as its gravity, spring or elasticity, &c. and likewise in his 



