INDEX. 



487 



Magnetical and meteorological obser- 

 vations, grant of ^6500 for the pur- 

 chase of instruments, 21. 



made at Madras, 371, 396 ; 



at Trevandrmn, 39G. 



Magnetism, Prof. Gauss's researches 

 on, 99. 



, theory of induced, 142. 



, terrestrial, Lieut-Col. Sabine's 



contributions to, 212, 221, 287, 369, 



465, 468. 



Malpighian bodies of the kidney, on 

 the structure and use of the, 375. 



Mansfield (Earl of), notice of the late, 

 264. 



Mantell (G.) on the lower jaw of the 

 Iguanodon, and on the remains of 

 the Hylseosaurus and other Sau- 

 rians of Tilgate Forest, 289, 290. 



on the fossil remains of turtles 



in the chalk formation of the S. E. 

 of England, 305. 



Manuscript letters in the Library of 

 the Royal Society, a catalogue made 

 of the, "25 3. 



Manuscripts in the Library of the 

 Royal Society, a catalogue made of 

 the, 253. 



Marsh (Dr. Herbert, Bishop of Peter- 

 borough), biographical notice of,l 74. 



Marum (Dr. M. van), notice of the 

 late, 99. 



Mastic, resin of, 136. 



Media, absorbent, of the analysis of 

 the chemical rays of the spectrum 

 by, 209. 



, of the exalting and depressing 



power exercised by certain, 209. 



Medulla oblongata, the cerebellum 

 considered as an appendage to the 

 brain rather than to the, 473. 



Medulla spinalis, on the decussation of 

 fibres at the junction of, with the 

 medulla oblongata, 71. 



Megalosaurus, remains of, discovered 

 in the strata of Tilgate Forest, 290. 



Membrana granulosa, 74. 



Mercury, on a new equi-atomic com- 

 pound of bicyanide with binoxide 

 of, 135. 



, photographic properties of, 398. 



Meridian, LaCaille's arc of the, on the 

 verification of the amplitude of, 192. 



Metals, on their reduction from solu- 

 tions of their salts by the voltaic 

 circuit, 447. 



Meteoric stone, account of the fall of 



a, at the Cape of Good Hope, 134, 

 210; chemical account of the, 134. 



Meteorological instruments at the 

 Royal Observatory, Greenwich, with 

 which observations have been made, 

 from Nov. 1840 to July 1841. 330. 



journal kept at Allenheads, 



Northumberland, 221, 297, 371. 



journal kept at the Falkland 



Islands, 330. 



journal kept at Guernsey, 466. 



• observations on the mode in 



which they have been recorded in 

 the Journal of the Royal Society, 2. 



made at Alten in Finmar- 



ken, 195 ; remarks on, 229. 



taken on board H.M.S, 



Erebus and Terror, 293, 303, 374, 

 380. 



taken at Constantinople, 



293. 



made at St. Helena, 295. 



made at Toronto, 295, 380. 



made at Plymouth, 303. 



taken at Madras, 362, 371, 



382; at Simla, 362,371, 383. 



taken at the magnetic ob- 

 servatory, Cape of Good Hope, 374, 

 380. 



taken at Van Diemen's 



Land, 374, 378, 380. 

 taken by the Niger Expe- 

 dition, 380. 

 , taken at Georgetown, 



British Guiana, 467. 

 register kept at Port Arthur, 



200, 232, 329. 

 register kept during a voyage 



from London to Calcutta and back 



to London, 329. 

 Microscopical examination of the teeth, 



70. 



examination of the texture of 



shells, 435. 



examination of the texture of the 



iris in different animals, 439. 



Milan, magnetic-term observations 

 made at, 280,311. 



, variation of the magnetic decli- 

 nation, horizontal intensity and in- 

 clination observed at, 282, 294, 298, 

 329, 362, 371, 435, 456, 462. 



, observations on magnetic direc- 

 tion and intensity made at, 295, 298. 



Mixed plates, on the colours of, 33. 



Modulus of a machine, 319; of a pul- 

 ley, 320. 



C 



