Page 



J-jig'ht Houses— Comets, - - - - - - - -199 



Natural History — Canals in Great Britain, . . - - 200 

 Pyroiigneous Acid — Chlorate of Potash — Test for Iron — ^Test for 

 Copper — Blowpipe Experiments, - - - - - -201 



Ink— Watchmakers' Oil— Paris, - 202 



Rapid Evaporation — Steam Engines, . . . - . 203 



American Geography — Georama— -Deaf and Dumb, - - 204 



Bulletin Universel dcs Sciences et de L'Industrie, - - - 205 

 Mr. Perkins's Steam Engine — Artificial Mahogany, - - 206 



New Pyrophorus of Tartrate of Lead — Corrosion of the Coppering 



of Ships, 207 



Purple colour of Glass increased by light — Flora of the Greek Archi- 

 pelago — Effects of an Earthquake on the vegetation of Wheat — 

 Maize grain remarkably retentive of the power of Germinating, 208 

 Morality of the Greek and Roman Philosophers, - 365 



Portugal, - - 366 



Astronomy, ... ...... 357 



Rural School in Bale — Electricity — Address to the Helvetic Society, 368 



Ferussac's Bulletin, - - 374 



Lychnophora — Antediluvian Plants — Marine Fossil Plants, - 375 

 Analecta Entomologica — Prof. Berzeiius's Letter to the Editor, 376 



Prehnite— Olivine, - - - 378 



Mechanique Celeste, 379 



Cuvier's Ichthyology— Fine Arts — M. Guinand's Flint Glass, - 380 



Belfast Natural History Society, - 381 



Artists' Lecture Room, - .._-.- 382 



Mr. Owen, and his Plans of Education, 383 



Optical structure of Minerals — Himalayah Mountains, - - 384 



Mr. Dalton's process for determining the value of Indigo, - 385 



Bois de Colophane — Brandy from Potatoes, .... 386 



No diurnal variation of the Needle at the Equator— Increase in the 

 qnantity of R ain — Potassium and Sodium. - - - . 387 



