Mtfcellanea Curio fa. 1 1 7 



comes to be 33 parts, and when it boils ve- 

 nemently, 34 parts ^ and the Heat of melt- 

 ed Tin beginning to come to the Confidence 

 of an Amalgama, 72 parts ; and the Heat 

 of the fame, when in cooling 'tis come to 

 downright Hardnefs, 70 parts. And having 

 deter mi n'd thefe Things, in order to find 

 out the reft, I heated a piece of Iron 'till it 

 was Red-hot enough, and taking it out of 

 the Fire with a pair of Tongs that were 

 alfo Red-hot , and I it in a cool place, 

 where the Wind blew conftantly. Then 

 putting upon it little pieces of Metals and 

 various other liquable Bodies, I obferv'd' the 

 times of Refrigeration, 'till all thofe melted 

 parts having quite loft their Fluidity, be- 

 came hal'd and folid again, and the Heat of 

 the Iron was equal to that of a Humane Bo- 

 » dy. Then fuppofing the Exceflfes, of the 

 Heats of the Iron and the liquefied Parti- 

 cles approaching to Induration,^ above the 

 Heat of the Atmofphere founded by the 

 Thermometer, 10 be in a Geometrick Pro- 

 greflion, when the Times are in an Arith- 

 metick one \ by this means all the Degrees 

 of Heat were difcover'd. But 'tis to be ob- 

 ferv'd that I plac'd the, Iron hot in a ferene 

 and quiet Air, but in a Wind bio wing, uni- 

 formly, fo that the Air which was heated by 

 the Iron might always be carried away by 

 the Wind, and a cold Air with an uniform 

 Motion might fucceed in the place of it. 

 For thus, equal parts of the Air were heat- 

 ed in equal times, and acquired a Heat 

 proportional to that of the Iron. But the 



> Degrees 



