448 INDEX. 



Degrees, table of equivalents tor convertingj into time, 39,5 

 Desquamation of certain rocks, observations on, 237 — 257 

 Dichroisin of tourmaline, remarkable, 219 

 jDore (mount), analysis of the mineral and thermal waters of,417 

 Drawing-tablets, improved, notice of, 222, 223 



Earth, observations on the temperature of, 144, 145 

 Earthquake at Zante, phenomena of, 232 ; effect of earthquakes 



on t^iagnetism, 434 

 Economy of fuel, experiments and remarks on, 58 — 61 

 Edinburgh, remarks on the geology of the country around, 



171—180 

 Eggs, preservation of, 424 

 Electricity, Zamboni's discovery in, confirmed, 219; of the 



atmosphere, 431 

 Electro-magnetism, experiments in, 161, 162 

 Electrometer for minerals, 432 

 Equivalents, t3.h\e of, for converting hours, minutes, and seconds 



into space, 394 ; and for converting degrees, minutes, and 



seconds into time, 395 

 Ethiop's Mineral, new process for preparing, 225 



Faraday (Mr.), on the change of vegetable colours as an alka- 

 line property, and on some bodies possessing it, 315 ; on the 

 hydriodide of carbon, 429 



Ferro-prussiafe of potash, on the constitution of, 147 — 150 



Fibrina, on the influence of water on, 419 



Fish-uil, mode of purifying, 423 



Flour, analyses of two species of, 405, 406 



Forense and Formate of Lead, analysis of, 429 



Fourier (M.), observations of, on the temperature of the earth, 

 144, 145 



Fruits {gxe&n), influence of, on the air, 152 — 154 



Fuel, experiments and remarks on the economy of, 58 — 61 



Fusible Metal, preparation and application of 424, 425 



Gas, obtained from coal-tar, 227 ; from oil, process of obtain- 

 ing, 423 



Gauss (M.), notice of a new signal invented by, for trigonome- 

 trical measurements, 421, 422 



' Gentleman's Journal,' bibliographical notice of, 47 



Geographij of ip\anta, remarks on, 162 — 164 



Gilbert (Davies, Esq.), on the ventilation of rooms, and the 

 ascent of heated gases through flues, 113 — 120 



Gold, crystallized, 428 ; on the triple chloride of gold and so- 

 dium, 400 



Griffiths (Mr. Ralph), biographical notice of, 309—311 



Grain, description of a building for preserving, 165, 166 



