afr CONTENTS. 



CHAT. V page 123. 

 Of Boiling Vapour, &c. 



/ from cannon Fluids. Specific Gravity of 



yapoltr.In iu'hc f Manm Dr. Black was hd in firm bis Theory 

 of latent Htai. Immtnfe 'Force cf Papo-ir.* Boiling. All Fluids 

 toil in a lefs Temperature in Vacua, than ur.cier the Preljure of the 

 A'.mbfpbcre. "Experiments.- Phenomena, of Boiling and "Evaporation 

 xplaincd.-Why Water extinguishes F!ame.~~'Sptmt6lneffus i-af era- 

 tion.'Pkenomena cf Deivs, Mijls, &c. 



CHAP. VI. page 140. 

 Of Ignition and Combuftion. 



Ignition, ivbaf, bo*iv produced. Burning of Phofpborus.I/tf!ammA~ 

 t>le Air. Culinary Fires. Lamps, &c.-Why Flame afcen >. 

 Theory of Argand's Lamp.-BtJl Form of Grates, Stoves, (ffr. 

 Combuftion produced by feme Sub/lances without a Communication 

 with the Atmofpherc. Gtih-fotuikr, &c. Iron made to burn like 

 a. Candle. Spontaneous Ignition. Curious Facts. Quantity tf 

 Hear excited infufmg different Bodies. Scale of Heat. 



BOOK III. 



CHAP. L -page 155. ^ 

 Hiltory of Difcoverics concerning Light, &c. 

 Opinions cf tie Platonics. Of A;-'tjlc>le.~Of Albazen. Of Roger 

 Bnccn. The 'Invention -of Sptfiaeles. Trcatife efMaurclycus on Vi- 

 f.&n~zL'>ri* f>na Rcc/cn that the Sun's Image appears 



an angular Aperture. Lifuen- 



t.'jn cf the Camera Qbfcura. Conjeflures of Fletcher an the Rain- 

 bo-iv. Invention of the Telefcope.Suppofid to be by Zacbarias 

 Janfcn. Galileo.*Kefl<!r? Invention cf tbe Micrcfcopc. Tycbt 

 Eraf.t. Reformation cf Jifcorted Inmges.* Snellius and Hcrtenjius. 

 Dcj'cartcs. Scbeintr. Pfftkity of Light difcovere(tj~-Boylt*s 



Nekton; bis Dif- 



c o ; n. On 7?;; . -Bolng-niar. SfcKC.- 'BalJ- 



rr. Melville* DoUuntl. 

 De laMotte,~Dc!aval. 



CHAP. IT. page 172. 

 Of the Nature of Light. 



/'., . ' ' '/"I;^. Theory cf a vibrating Me- 



/,,. Drfcarte!, & c,-Objc8iff)!s to this theory. 



v minttte Parti chs projtfltd from the luminous 



Body. -Inquiry rrfpccling the Identity of Light and Fire. Experi- 

 DftK:s of Mr. BovU. U'hy Light is net always accompanied 'with 



