480 



INDEX. 



Crystallograpliy, on tlie theory of, 116. 

 Curvature of surfaces, on, 112. 

 Cuvier (M. F.), biograpliical notice of, 

 98. 



Cyanotype, a photographic process, 

 397, .398. 



Daguerreotype plates, new mode of 

 preparation of, 315. 



Dah-ymple (John; on the nerves of 

 the uterus, 323. 



Dalton (Dr.) on the phosphates, 162. 



on the arseniates, 162. 



, a portrait of, presented to the 



Royal Society, 333. 



Daniell (Prof.), a Copley medal award- 

 ed to, 23. 



on voltaic combinations, with re- 

 ference to the mutual relations of 

 the generating and conducting sur- 

 faces, 43. 



— — , account of the effects of a large 



constant battery, 147. 

 »— — on the electrolysis of secondary 



compounds, 153, 231. 

 on voltaic combinations, 43, 147, 



383,384. 



, a Royal medal awarded to, 422. 



Darwin (C.) on the parallel roads of 



Glen Roy, 122, 127. 

 Davidson (John), notice of the late, 



17. 



Davy (Dr. John) on the male organs 

 of some of the cartilaginous fishes, 

 129. 



on the form of the blood-particles 



of the Ornithorhynchus hystrix, 

 232. 



— — on the torpedo, 291. 



, experiments on the blood in con- 

 nexion with the theory of respira- 

 tion, 78. 



Davy (Rev. M.), notice of the late, 

 173. 



DeCandolle( A. P.), biographical notice 

 of, 346. 



Decidua, anatomy and physiology of 

 the, 370. 



Decomposition, vegetable, influence 

 of nitrogen in promoting, 148. 



DeMorgan (A.), description of a cal- 

 culating machine, 243. 



Diamond, on a remarkable property 

 of the, 291. 



mines of Golconda, 280. 



Differential resistance measurer, 471. 



Dip of magnetic needle in the West 



Indies, on the North coast of Brazil 



and North America, 4. 

 Disc, the, of Prof. Baer, 75. 

 Discharge (electric), conductive, 50; 



disruptive, 50, 51, 55; electrolytic, 



50 ; difference of, at the positive and 



negative surface of conductors, 54 ; 



spark, 51 ; brush, 52, 55 ; glow, 55; 



dark, 56 ; convective, 56. 

 Discs, primitive, in blood-corpuscles 



exhibit an inherent contractile power, 



324. 



Dollond (G,), a portrait of, in the pos- 

 session of the Royal Society, 402. 



Donation Fund, some observations 

 to call attention to the, 372. 



Drach (S. A.) on the diurnal tempe- 

 rature of the earth's surface, 377, 

 444. 



Dragon's blood, resin of, 136. 

 Drawing, photogenic, 120, 124. 

 Dulong (P. L.), biographical notice of, 

 97. _ 



Dumfries, account of the hurricane of 

 January 7, 1839, 123. 



Dunlop (J.), observations of the dip 

 and intensity made at sea, between 

 England and Australia, 212. 



Earle (H.), notice of the late, 95. 

 Earth, on the diurnal temperature of 



the, 377, 444. 



, on the figure of the, 289. 



, on the state of the interior of 



the, 83, 115, 129, 367. 

 Earthquake in one of the Scilly Islands, 



122. 



Earthy and alkaline bodies, on the 

 formation of, witli reference to their 

 presence in plants, 131. 



Eldon (Earl of), notice of the late, 94. 



Electrical induction, specific, Prof. 

 Faraday's discovery of, 37, 100. 



Electric charge, penetration of, within 

 a dielectric, 39. 



conditions of the rocks and me- 

 talliferous veins of mines in Corn- 

 wall, 317. 



current, nature of, 56 ; trans- 

 verse force of, 56. 



currents, Dr. Ohm's researches 



into the laws of, 336. 



force of the Gymnotus, on the 



character and direction of the, 111. 



force, experimental relation of, 



to nervous force, 112. 



force or forces, nature of, 77 ; 



