‘Cuvier's og" Fine Arts—M. Guinand’s Flint Glass, - 
‘Belfast N atural tty Sits - 
Artists’ Lecture Room, Fae * 
Mr. (swen, and his pra of Edu Saito; . - = > 
Optical structure of Minerals—Him alayah Mountains, . : - 
‘Mr. Dalton’s process for determining 0g! waine of Indigo, “ 
Pot 3 
Wo diurnal variation of the N aoaia at the Egoator—Inoene Bs ‘the 
f Sodiu cs 
CONTENTS. Vi 
Page 
ouses—Come os Bee Ty = 469 
Natural History——Canels i in n Great Brit tain, 200 
 Pyroligneous Acid—Chlorate. wot Potash—Test <4 Iron—Test = 
Copper—Blowpipe Experiments, 201 
Ink—Watchmakers’ Oil—Paris,  - OE SR ap oe eae 
__ Rapid Evaporation—Steam Engines, —s  ° sus 
_ American Ge hy—Geo ramia—Deaf and Bulbs: - - 204 
Bulletin Universel des Sciences et de ry rage - . - 205 
Mr. Perkins’s Steam Engine—Artificial Mahogany, 206 
New He phorus of Tartrate of Lead—Corrosion of the : Goppering 
207 
Purple Bier Hass increased by light—Flora of the Gree kk Avehi 
sr a of an Earthquake on the vegetation of Wheat— 
aize grain feniattably retentive of the power of Shea tie 208 
Morality of the Sree ne Rega ps hel ae rs, 365 
’ Birt v. - - ate 
Ru ral Sohool i in in Bales Address to the Helvetic Society, ie 
Ferussac’s Bulletin, 374 
Lychno ieig—Aiisdilavien Plants—Marine Fossil Plant ts, - 
iAualecta Entomol eo ee a 8 peter. to the 1° Cait 
I rehnite—Olivine, - 
Méchani ne cS 
Bois de Colophane—Brand 
qnantity of Rain—Potassium and 
