482 



Davidson's, Mr., expedition to 



Tinibuctoo .... 312 

 Dead sea, water of . . . 103 



Deweylite ..... 337 

 Diamonds of tbe Uralian mountains 318 

 Diatase, action of 301 



Distilling apparatus by Coffey . 30 

 Donium, a new metal . . 426 



Douglas, Mr. David, account of 72 

 Dutch liquor, composition of . 300 

 Dyeing-niadder . . • .44 

 Dyeing, the art of . 209,274,370 

 — test of . . . .383 



Earth, temperature of . 



Ehrenberg on preserving minute 

 animals ..... 



Electrical conductibility, mode of 

 determining .... 



currents, chemical action 



Electricity, employment of, in dis- 

 solving calculi .... 



developed bv the friction 



of metals .... 



, atmospherical 



, currents in conducting 



paralysis of the tongue 



7(1 



treated bv 



•, researches in . 



-, improvements in 



119 

 120 



121 



ib. 

 123 

 124 



127 

 147 

 456 

 103 

 415 

 306 

 325 

 301 



Grasshopper, preserved specimens 

 of 75 



Grav, Mr. J. E., on distinguishing 

 some testaceous mollusca . 228 



Guaiac African .... 310 



Guitar, mode of tuning without the 

 assistance of the ear . . 113 



Gypsum, action of, on vegetables . 467 



Elton sea, water of 

 Emmonite, a new mineral 

 Entomostraca, new species of 

 Eriometer of Young 

 Ether, new .... 



Faraday, Dr, researches on elec- 

 tricity by .... 147 



— on silicified fossils . 155 



Farquharson, Rev. Mr., on ice 

 formed at the bottom of running 

 water ..... 145 

 Flamsteed, Rev. John, life of . 1 



catalogue edited by 



Ililley, burned by himself . 22 



character of . . 388 



— . by Hodgson . 392 



Fossils, silicified, on . . 155 



Franklin, Dr. Benjamin, sends a 

 powerful natural magnet to Pro- 

 fessor Anderson . . . 273 



Galathea, new species of, . . 305 



Gordius aquaticus in insects . 76 



Gastric juice, composition of . 78 



(ientian, extract of, . . . 464 

 Geographical discovery, pi 



of, . . . . . 310 

 ( ilobe, temperature of, . . . 226 

 Gold, method of colouring orna- 

 ments of, .... 302 



Halley, Dr., an impudent editor . 

 Heat, radiating, reflexion of, 

 Heat and light, theory of, . 

 specific, of bodies, 



Ilenwood, Mr. W. J. observations 



on steam engines . 

 Hieroglyphics, Egyptian, 

 Holmite, a new mineral, . 

 Hydrargvro-cyanurets, on some . 

 Hydrogen, specific gravity and 



atomic weight of 



19 

 129 



222 

 255 

 290 



390 

 326 

 335 

 355 



190 



Ice formed at the bottom of water 1 65 

 Indigo, used in epilepsy . . 153 

 Indica of Ctesias, note on, . . 389 

 Iron sulphate, of, in dyeing . 981 

 Isinglass, action of, in clearing malt 



liquor explained . . .1 05 

 Interferences, theory of, . . 323 

 Isomorphism, on a difficulty in . 433 



Jackson, G. H., on some hvdrar- 

 gyro-cvanurets .... 355 



Jalap roots, adulteration of, . . 390 



Jardine, Sir \V., notice of the parr, 

 by, 969 



Judgment, day of, when it should 

 happen .... 88 



Jupiter, observations of, . . 464 



Kane, Dr. R. J., on the action of 

 ammonia and muriatic acid .218 



Light, action of, upon rotating disks 41 



white, composition of . 58, 94 



effect of, on magnetic needles 117 



absorption of, . . 118 



undulatory theory of, . 323 



refracted and diffracted on . 347 



Lime, in dyeing . . . 278 



■ chloride of, . . . 287 



Link, Professor, on zoophytes and 



plants 200 



Lithotritv, comparative success of, 143 

 Lithotomy, comparative success of, 144 

 Logwood and alum mordant, co- 

 lours with, .... 373 



— and copper . 374 



Logarithms discovered by Napier . 164 



Madder and Madder dyeing. 11, 135 



