90 
GENERAL INDEX. 
Column-printing telegraph, F. Higgins 
on the, 1890, 959 
* Columnar structures, J. Curry on the 
formation of certain, 1868, 62 
Colza oil, the electric discharge through, 
A. Macfarlane on, 1881, 556 
Comatula, Dr. Allman on an early stage 
in the development of, and its palaeon¬ 
tological relations, 1862, 65 
* - rosacea, C. celtica, from the 
Hebrides, Dr. Carpenter on, 1866, 72 
- the nervous system of, P. H. Car¬ 
penter on, 1879, 418 
Comatulce, the British, note on, by P. H. 
Carpenter, 1881, 672 
Combining proportions of metals, Dr. J. H. 
Gladstone on the relation between the 
specific refractive energies and the, 
1869, 21 
Combustion, action of light on, Charles 
Tomlinson on the supposed, 1869, 78 
-—— of gases, H. B. Dixon on the incom¬ 
plete, 1884, 671 
-in explosions, the incompleteness 
of, Prof. H. B. Dixon and H. W. 
Smith on, 1888, 632 
-- of gases under pressure, Prof. E. 
Frankland on, 1868, 37 
* -of gases under pressure, experi¬ 
ments on the, by Profs. Liveing and 
Dewar, 1890, 776 
Comet II. 1862, Eev. R. Main on R.A. 
and N.P.I). of, 1862, 15 
*--of 1811, Cornelius Yarley on the, 
1866, 12 
- ‘ b ’ 1881, the photographic spectrum 
of, W. Huggins on, 1881, 520 
-(Wells) 1 , 1882, the photographic 
spectrum of, Dr. W. Huggins on, 1882, 
442 . 
Cometic nebulae, Prof. A. W. Rucker on, 
1889, 489 
-perihelia, the distribution of, A. S. 
Davis on, 1870, 22 
--perihelia, the arrangement of, with 
reference to the sun’s march in space, 
Dr. H. Muirhead on, 1881, 532 
- perihelia, the heliocentric longi¬ 
tudes of, Dr. H. Muirhead on, 1889, 
4 S 8 
Comets, Prof. P. G. Tait on, 1869, 21 
- the cause of bright lines in the 
spectra of, G. J. Stoney on, 1879, 251 
-periodic, of short period, the direct 
motion of, Prof. H. A. Newton on, 1879, 
272 
-. and meteorites, the physical and 
chemical constitution of, P. Brahamon, 
1889, 520 
-—— and planets, the resistance of the 
ether to the, and on the rotation of 
the latter, J. S. S. Glennie on, 1861, 13 
^Commensalism in the Holothuria, Dr. 
A. F. Anderson on a case of, 1878, 559 
Commerce, the courses of migration and, 
traced by art relics and religious 
emblems, Dr. J. S. Phene on, 1878, 
583 
-Charles Thompson on some excep¬ 
tional articles of, 1861, 247 
- schools of, SirP. Magnus on, 1887, 
841 
Commercial crises, the periodicity of, and 
its physical explanation, Prof. W. S. 
Jevons on, 1878, 666 
--- fluctuations, W. S. Jevons on the 
study of periodic, 1862, 157 
--panics, W. D. Henderson on, 1878, 
193 
- geography, societies of, E. J. 
Watherston on, 1881, 748 
-geography, the physical basis of, 
Dr. H. R. Mill on, 1889, 659 
- geography of Africa, J. S. Keltie 
on the, 1890, 892 
■-relations of Canada with Spain and 
her colonies, A. de Marcoartu on the, 
1884, 870 
--- statistics, W. Botly on, 1888, 760 
*Commerell (Adm. J. E.) on the pre¬ 
vention of accidents at sea, 1884, 897 
Communication between passengers and 
guards in railway trains, S. Alfred 
Yarley on, 1869, 220 
-W. Stroudley on, * *1875, 252 ; *1876, 
233 
Commutator of constant resistance, a 
form of mercury contact, for use in 
adjusting resistance coils by Wheat¬ 
stone’s bridge, and for other purposes, 
Prof. J. V. Jones on, 1885, 907 
*Comoro Islands, Capt. A. de Horsey on 
the, 1864, 191 
-Lieut.-Col. L. Pelly on the, 1865, 
127 
Compass, Archibald Smith and F. J. 
Evans on the effect produced on the 
deviation of the, by the length and 
arrangement of the compass needles, 
1861, 45 
-F. J. Evans on H.M.S. ‘Warrior’s ’ 
compasses, 1861, 45 
— Committee, Liverpool, report on the 
three reports of the, and other recent 
publications on the same subject, by A. 
Smith and F. J. Evans, 1862, 87 
- Committee, the Liverpool, J. T. 
Towson on the report of, 1870, 19 
-Prof. IT. D. Rogers on the ‘liquid 
steering-compass ’ and ‘ monitor com¬ 
pass,’ 1864, 14 
* - E. Hopkins on the depolarisation 
of iron ships to prevent the deviation 
of the, 1866, 13 
* - correction in iron ships, Sir W. 
Thomson on, 1876, 45 
t-Sir TV. Thomson on the effect of 
the rolling of ships on the, 1874, 32 
