406 
GENERAL INDEX. 
Sulphur cells, S. Bidwell on the sensitive¬ 
ness to light of selenium and, 1885, 981 
-- cell, with a solid electrolyte, S. 
Bidwell on the generation of a voltaic 
current by a, 1885, 982 
-in coal and coke, estimation of, F. 
Crace-Calvert on the, 1871, 68 
_-in coal gas, a method for the deter¬ 
mination of, A. Vernon Harcourt on, 
1870, 59 
*-the estimation of, W. Marriott on, 
1870, 60 
--compound formed by the action of 
sulphuretted hydrogen on formiate of 
lead at a high temperature, Vv T . J. Hurst 
on the, 1861, 82 
-in Corfu, Prof. D. T. Ansted on a 
deposit of, 1863, 64 
.- dichloride, J. Dalzell and T. E. 
Thorpe on the existence of, 1871, 68 
--in mixed gases, Dr. W. Bird Hera- 
path on a new method of detecting, 
by its hydrogen compound, 1864, 31 
.-in iron or steel, A. V. Harcourt on 
colour tests for the estimation of, 1879, 
303 
--manufacture of, from alkali waste 
in Great Britain, Dr. Ludwig Mond on 
the, 1868, 40 
--in organic compounds, R. T. Plimp¬ 
ton on the estimation of the halogens 
and, 1887, 669 
■-and oxide of manganese, I. Lowthian 
Bell on a method of recovering, used 
at Dieuze, near Nancy, France, 1867, 
*-the regeneration of, employed in 
the alkali manufacture by the Mactear 
process, J. Mactear on, 1877, 52 
-— separation of, by an organism (Beg- 
gatoa alia), A. W. Bennett on the, 1884, 
735 
.- springs of Valdieri in Piedmont, M. 
Moggridge on the ‘ Muff a ’ of the, 1868, 
106 
*—— -urea, Prof. J. E. Reynolds on the 
action of the, in metallic solutions, 
1874, 66 
-urea, notes on the preparation of, 
by Prof. J. E. Reynolds, 1874, 66 
-waters of Yorkshire, C. II. Botham- 
ley on the, 1890, 779 
Sulphuretted hydrogen, the action of, 
upon silver, Prof. F. P. Dunnington on, 
1884, 678 
Sulphuric acid, action of, on etliylaniline 
and dimethylaniline, Dr. H. E. Arm¬ 
strong on the, 1873, 62 
*-the distillation of, T. Fairley on, 
1870 55 
T. Tate on the elasticity of the 
vapour of, 1863, 17 
— native, Prof. Mallet on the occur¬ 
rence of, in Eastern Texas, 1872, 78 
Sulphuric acid, manufacture of, J. Pat- 
tinson on the various kinds of pyrites 
used on the Tyne and neighbourhood 
in the, 1863, 49 
Sulphurous acid, the action of, in aqueous 
solution, on phosphates and other com¬ 
pounds, Dr. Gerland on, 1870, 56 
-P. Spence on the economisation of, 
in copper-smelting, 1867, 43 
Sumatra, H. O. Forbes on the Koeboes 
and other tribes of, 1883, 565 
- Central, the Dutch expedition to. 
Prof. P. J. Veth on, 1879, 434 
Sun, autographs of the, Rev. Prof. Selwyn 
on, 1862, 17 
- the chemical elements in the, Profs. 
Dewar and Liveing on, 1883, 455 
-Dr. Janssen sur un methode pour 
obtenir les images monochromatiques 
des corps lumineux, 1869, 23 
* -the eclipse of the, observed at 
Siam in April 1875, Dr. J. Janssen on, 
1876, 40 
* -elements in the, J. N. Lockyer on 
the, 1873, 65 
--- the forms of the influence exerted 
by the, on the magnetism of the earth. 
Prof. Balfour Stewart on, 1883, 419 
* -glows and halo, the recent, in con¬ 
nection with the eruption of Krakatoa, 
Prof. E. D. Archibald on, 1884, 641 
- heat coefficients, report of the Com¬ 
mittee appointed for the calculation of, 
1879, 66 ; 1881, 89 
-heat from different parts of tire solar 
disc, a radiometric record of, W. E. 
Wilson on, 1890, 760 
* -heat received at the several lati¬ 
tudes of the earth, taking account of 
the absorption of heat by the atmo¬ 
sphere, with conclusions as to the 
absolute radiation of earth-heat into 
space, and the minimum duration of 
geological time, Prof. S. Haughton on 
the, 1878, 482 
- the internal constitution of the. 
Prof. A. Schuster on, 1883, 427 
-light, the action of, on P 2 0 3 , Rev. A. 
Irving on, 1883, 463 
——- light, T. Gaffleld on the action of, 
on colourless and coloured glass, 1872, 
37 
-light and sky light at high altitudes, 
Captain W. de W. Abney on, 1882, 
459 
—-—- or moon, magnetic effect of the, 
G. Johnstone Stoney on the amount of 
the direct, on instruments at the earth’s 
surface, 1861, 47 
--- myths in modern Hellas, J. T. 
Benton, 1888, 850 
-the nature of the corona of the, Dr. 
W. Huggins on, 1885, 932 
-the period of rotation of the, as 
