222 PHILOSOPHICAL TUANSACTIONS. [aNNO 1685. 



A method is given for drawing an oil and spirit of paper. An account of the 

 Peruvian bark is inserted ; with the manner of drawing a tincture, and making 

 an extract of it. An account is given of sugar, and the spirit of it, and of 

 phosphorus. 



Collegii Experimentalis, sive Curiosi, Pars Secunda ; per J. Christ. Sturmium, 

 Alt. 4to. lt)85. N° 175, p. 1184. 



The author, in this second part of his collection, describes many new expe- 

 riments and philosophical instruments; as a glass diving bell; some amend- 

 ments in the air-pump, particularly of that kind which is portable ; some expe- 

 riments tried on the baroscope, polished planes, &c. ; some hygrostatical ex- 

 periments, together with the description of the instruments by which they were 

 performed ; of long siphons, and their use in conveying water ; of glass bub- 

 bles, and the reason of their flying into little pieces on breaking; of water pots; 

 a sort of lamps; and of stentoreophonic tubes ; the invention of which he justly 

 ascribes to Sir Samuel Morland ; he speaks of a new sort of thermoscope ; of 

 the Magdeburg hemispheres, mentioned by Guerik, and the difficulty of sepa- 

 rating one from the other, when the air included in them is rarefied. He treats 

 of the force of breath blown into a bladder, and raising a considerable weight ; 

 and explaining muscular motion by this principle, after Dr. Croon's manner, 

 proposing that by these means a statue of a man may be made to move in imi- 

 tation of nature. He examines the experiment of the hydria helmontiana, 

 urged by Dr. More, as an argument for his hylarchic principle. He describes 

 an aerometer, consisting of an hygrometer, thermometer, and barometer. 

 Speaking of magnetical experiments, he affirms, that he has a large needle, ex- 

 ceeding a rhinland foot, and 7 inches, both ends of which apply to either pole 

 of the magnet. 



To this treatise the author subjoins an epistle to Dr. More of Cambridge, con- 

 cerning his hylarchic principle; where he examines the Doctor's demonstrations 

 of that principle, and answers the arguments against the elasticity of the air. 



Account of a strangely self-moving Liquor. By Mr. Boyle, F~. R. S. 



N° J 76, p. 1188. 



An ingenious teacher of mathematics, having occasion to make a composition 

 for a new fire-engine, mixed several ingredients in an earthen pot over kindled 

 coals; but incautiously suffered the matter to take fire: having stifled the flame 

 as hastily as he could, and removed the vessel from the fire, and suffered it to 



