392 
GENERAL INDEX. 
Spectrum, the effect of the, on silver 
chloride, Capt. Abney on, 1881, 594 
- of hydrogen. A. Schuster on the. 
1872, 38 
-the length of the prismatic, as a 
test of chemical purity, Dr. J. H. 
Gladstone on, 1883, 461 
— -microscope, H. C. Sorby on a new 
form of, I 860 , 11 
--photographic, of the electric light, 
\V. A. Miller on, 1861, 87 
* -photography, a method of showing 
the sun’s rotation by, Capt. Abney on, 
1877, 31 
* - of polarised light, A. "Waugh on 
the, 1864, 191 
*—-— prismatic, the lower limit of the, 
Lord Rayleigh on, 1877, 32 
--a pure, the formation of, by Newton, 
G. Griffith on, 1885, 940 
- radiant, Sir D. Brewster on the, 
1867, 8 
--referring to a scale of wave-numbers 
the positions of lines in the, G. J. 
Stoney on the advantage of, 1871, 42 
--solar, Dr. J. H. Gladstone on the 
means of observing the lines of the, 
due to the terrestrial atmosphere, 1862, 
43 
- solar, George Gladstone on the 
atmospheric lines of the, in high 
latitudes, 1868, 18 
Specula of reflecting telescope, polishing 
the, the Earl of Rosse on, 1884, 637 
^Speech, a hypothesis of the perception 
of articulate, Dr. Cassells on, 1876, 148 
--R. Dunn on the power of utterance 
in respect to its cerebral bearings and 
causes, 1868, 114 
Speed of floating water or of ships, A. 
E. Fletcher on the rhysimeter, an in¬ 
strument for measuring the, 1871, 234 
■- of ships, report on instruments for 
measuring the , 1872, 176 ; 1873 , 460 ; 
1874, 255 ; 1878, 219 ; 1879, 210 
Speeton clays, the, and their equivalents 
in Yorkshire, G. W. Lamplugh on, 
1890, 808 
Spence (James) on a novel method of 
covering boilers, pipes, and cylinders 
of steam-engines for preventing the 
radiation of heat, 1863, 187 
* -(J. B.) on the phenomena of the 
crystallisation of a double salt, 1870, 63 
-(Peter) on copper-smelting, 1864, 41 
* -- on a new process in the manufac¬ 
ture of white lead, 1866, 44 
* -on the economisation of sulphurous 
acid in copper-smelting, 1867, 43 
-on raising a temperature higher than 
212° F. in certain solutions by steam 
of 212° F., 1869, 75 
--- on an attempt to determine the 
boiling-point of the saturated solutions 
of various salts by boiling with steam 
at 100° C., 1870, 64 
Spence (Peter) on a new mode for the 
purification of sewage, 1880, 534 
-(W.) on patent tribunals, 1861, 265 
Spencer (J.) on researches in fossil bo¬ 
tany, 1881, 627 ; notes on Astromyelon 
and its root, 628 
-on the occurrence of a boulder of 
granitoid gneiss or gneissoid granite 
in the Halifax Hard-bed coal, 1888, 661 
* -(J. F.) and P. Westmacott on en¬ 
gineering manufactures of the Tyne 
and neighbouring districts, 1863, 192 
-- (Thomas) on the manufacture of 
steel in the northern district, 1863, 764 
Spender (Edward) on the‘truck system’ 
in some parts of the "West of England, 
1864, 175 
Spergularia marina, the stipules of, Prof - 
A. Dickson on, 1878, 568 
Sperm whale, C. W. Peach on the occur¬ 
rence of the, near Wick, N.B., 1863, 10 & 
Spermatogenesis of the Acarians, the, and 
the laws of spermatogenesis in general, 
Prof. G. Gilson on, 1887, 758 
*Spey bridge at Garmouth and the River 
Spey, P. M. Barnett on the, 1885, 1203 
Sphcerularia Bomhi , John Lubbock on, 
1862, 109 
Sphenopteris affinis, C. W. Peach on cir~ 
cinnate vernation of, from the earliest 
stage to completion, 1876, 94 , 144 
Sphere and roller friction gear, Prof. H» 
S. Hele Shaw on the, 1885, 1193 
- and roller mechanism for transmit¬ 
ting power, Prof. H. S. Hele Shaw and 
E. Shaw on, 1886, 484 
Spherical class-cubic with three single¬ 
foci. H. M. Jeffery on the, 1878, 490 
-class-cubics with double foci and 
double cyclic arcs, H. M. Jeffery on,. 
1876 , 19 
-- harmonics, W. K. Clifford on a, 
canonical form of, 1871, 10 
— harmonic of the nth. order, Sir W. 
Thomson on the general form of ay 
1871,25 
Spheroidal drops, R. J. Moss on, 1878 ,489 
- drops, the cause of travelling 
motion of, G. J. Stoney on, 1878, 442 
-- drops, the support of, and allied 
phenomena, G. J. Stoney, G. F. Fitz¬ 
Gerald, and R. J. Moss on. 1878, 441 
* -state of liquids, W. F. Barrett on 
a condition affecting the, and its 
] robable effect on certain boiler-explo¬ 
sions, 1872, 48 
Sphingidie, some hybrid, and other Lepi- 
doptera, E. Birchall on, 1870, ill 
Sphygmograph. Dr. J. Hughes Bennett 
on Marey’s new, 1864, 119 
-Dr. B. W. Foster on an addition to 
the, 1 S 66 , 91 
