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, with 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 ;
