INDEX. 
417 
Lizard, on the geology of the, 212. 
Loango , observations on, 45, 268. 
Low, Rev. G. on the tides in the Pentland Frith, 55. 
Lungs, on an apparatus for restoring the action of the, 53. 
Lunn , Rev. F. his analysis of native phosphate of copper from the 
Rhine, 211. 
Lupin, 3 6' 6*. 
Lusus Natures, account of one in China, 132. 
M 
Macaire, M. on the phosphorescence of the Lampyris noctiluca and 
splendidula, 389- 
MacCulloch, Dr, on the phosphorescence of marine animals, 388. 
Macgillivray, Mr, on the birds found in the district of Harris, 257* 
Machinery, on a regulator to equalize the velocity of, 215. 
Madrid, New, eruption of carbonised wood at, 404. 
Magnetic Attraction, observations on, 289- 
Magnetical Observations made during the late voyage to the Arctic 
Regions, 197. 
Magnetic Observations, history of those made at Zwanenburg, 137.— 
observations in Melville Island and Lancaster Sound, 1 97*— mas- 
ses, on the effect of position on them, 221. — attractions, Mr 
Barlow’s essay on, 261. 
Magnetism, on its connection with galvanism, 212.— on the applica- 
tion of it as a measure of electricity, 214. — on the effects of, on 
chronometers, 220, 383. 
Magnesia, on the action of water upon it, 305. 
Malam, Mr John, on an improved gas meter, 129* 
Malemha, account of, 47. 
Mangle, account of a Chinese one, 73. 
Map of the country south of Ava described, 75. 
Maxwell, Mr, on the countries of Congo and Loango, 45, 268, 
Mechanical inventions, history of, 113. 
Melville Island, account of, 184. 
Mesotypes, on the optical structure of the, 7* 
Meiallurgic Crystallography , 155, 344. 
Meteorological Observations made during the late voyage to the Arc- 
tic Regions, 199.— in Southern Africa, 279.— at Carbeth, 394. 
Meteor, gelatinous, observed in America, 3Q5 
Mica, on the optical structure of, 5. 
Milligan, Mr Edward, on the sword-fish cast ashore at Kirkbean, 399. 
Mills, on the metnod of keeping off the back-water from them, 222. 
Milne, Mr James, on the manufacture of block-tin pipes, 120. 
Minerals , on the connection between their optical structure and che- 
mical composition, 1. 
Mineralogy , on a new system of, founded ou the optical and physi- 
cal characters of minerals, 230. 
Missisippi, expedition to explore the sources of the, 232. 
Moll, M. G. on the magnetic observations made at Sparendam, 137. 
Monkeys in Congo, 268. 
Moon, heat detected in the rays of the, 21 6— volcanoes in the, ib. 
Mudge, Lieut, on the difference between the land and sea rates of 
chronometers, 378— on the magnetic action of St Mayo and 
Great Salvage Islands, 381. 
