INDEX. 



L. 



Page 



tavjs of Nature often difcovered by a happy coincidence 



of circumftances . . j2_ 



Locke, Mr. on fenfation - - - . ^60 



Z-ofuwd', reduced to whitenefs - . 207 



M. 



Mammouthy defcription of, by Mull E a . -67 



Affd'fl/, Go/d', given to Mr. Del AVAL - , 527 



• Sil'ver, to Mr. T. Kenry, junior ^20 



Melvill, Mr, on the colours of clouds . 235 



' on the poliflicd needle fwimming in 



«'^'^'- r . . . 462 



Mercury, phenomena of. explained by attradlion - 460 



Metals, confift of tranfparent matter - . 25. 



Meteorological Imaginations, Sec. by Dr. Franklin 373 



Minerals, examined as to the caufe of their colour 21 2 



il/«//o«, powers of in vegetables - . j.o 



N. 

 Narrative, of the fufferings of a collier - . ^g, 



Nash'o Hiflory of Worcefterfliire quoted, as to tl»e man. 



ner of making fait - - _ ^,~ 



A>f^/^, polifhed, how it fvvims on water - 451,461 

 Negro, gibbeted at Charleftown - - ^g^ 



Newton, Sir Isaac, difcovered the origin and nature 



of light and colours - - - 158 



■~ acknowledges the imperfeftion of his 



experiments relative to coloured fubftances - iro 



"^ his obfervations on grofs bodies, 



and light . . . . ,gg 



iViCHOLsoN's new inftrument, for meafuring the fpecific 



gravity of bodies - - - -gg 



J^ORDEN, his account of the remains of Thebes - 153 



O. 



Oeires, why they affume a blacker hue, when combined 



with oils r - , - 22t 



