zt 



374 



Index. 



Petroleum of Western Pennsylva- 

 nia, &c., 355 



Philosophical Society, Early His- 

 tory of, 101, 117 



Philosophy of Newton, &c., adapted 



to Atomic Theory, 52 



Photographed Images of Electric 



Sparks, 266 



Planets, Variation of periodic times 



of, 272 



President's Address, 1855, 1 



1856, 39 



1859 249 



Proceedings of Society, Plan of 



Printing PeriodicaUy, 258 



Reports to the Society,.... 158, 187, 207 



Retina, Persistence of Images on,.. 246 

 Rock Oil of Western Pennsylvania, 



&c, 355 



Rotatory Motion, 130, 201 



Sandstone Pused by Lightning, 186, 206 



Sensations on Climbing the Andes, 287 



Sewage, 99 



Skulls from Ancient Burial Places, 191 



Spinal Cord and Nerves, 348 



Spots on the Sun, 292 



Steam-Boilers, Incrustations in, 191 

 282, 317 



Steam, Density of, 285 



Sugar Refining, 367 



Sun, Matter Falling into the, 272 



Temperature and Climate, 164 



of Spring of 1855, 22 



of Water from Loch 



Katrine, 12 



Trap Dykes in Arran, 321 



Treasurer's Reports, .... 6, 42, 114, 250 



Voltaic Current, Force of, 324 



Voting, Method of, 199 



Working Classes, Education of, ... 82 



OLASGOW: PRINTEP BT BELI, ASP BAI\ 



