GENERAL INDEX. 
389 
Sorby (H. C.) on Jargonia, 1869, 75 
--on a new method for studying the 
optical characters of minerals, 1877, 
77 ; on the colouring-matters in human 
hair, 121 
-- on the exploration of the Settle Caves 
( Victoria Cave), 1878, 377 
-Address to the Geological Section, 
1880, 565 
-- on the conditions under which ordi¬ 
nary sedimentary materials may he con¬ 
verted into metamorphic rochs, 1882, 
239 
• - on fossil Polyzoa, 1882, 249 ; 1883, 
161 ; 1884, 97 ; 1890, 378 
- on recent Polyzoa, 1885, 48 I 
- on arranging an investigation of the 
seasonal variations of temperature in 
lakes, rivers , and estuaries, 1889, 44 ; 
1890, 92 
-- on the temperature of the tidal 
estuaries of the South-east of England, 
1889, 509 
Sorley (Prof. W. R.) on mining royalties 
and their effect on the iron and coal 
industries, 1888, 755 
*Sortais (M.) on an improved printing 
telegraph apparatus, 1862, 196 
*Souakim, Capt. Rokeby on the survey 
for a telegraph line between Berber 
and, 1873, 173 
*Sound, interference of, Prof. W. F. 
Barrett on an apparatus for showing 
the, 1874, 41 
■- signals, the transmission of, during 
fogs at sea, Prof. H. Hennessy on, 1861, 
*173 
- signals, transmission of, under water, 
report on the, 1865, 192 ; 1866, 212 
-signals, E. P. Edwards on, 1882, 670 
- velocity of, Dr. J. Stevelly on a 
mode of determining the, 1864, 20 
Sounder, automatic, J. Dillon on an, 1881, 
774 ; 1884,807 
^Sounding machine, an improved, Sir W. 
Thomson on, 1880, 703 
-ocean depths, recent improvements 
in apparatus and methods for, Rear- 
Adm. D. Ammen on, 1884, 629 
Soundings, deep-sea, Sir W. Thomson on 
the use of steel wire for, 1872, 251 
* -hying, an improved method of re¬ 
cording the depth in, Sir W. Thomson 
on, 1877, 218 
Sounds which accompany the diffusion 
of gases through a thin septum, the 
detection by means of the microphone 
of, W. Chandler Roberts on, 1878, 517 
South-African diamonds, Prof. J. Ten¬ 
nant on the, 1875, 82 
* -swifts and swallows, F. R. Surtees 
on, 1864, 191 
• -torrential floods. Dr. J. C. Brown on, 
1875, 190 
*South America, J. Ball on some points 
of physical geography observed during 
a recent tour round, 1882, 622 
South-Lancashire wells, T. 31. Peade on 
the, 1877, 66 
South-Sea Islanders, Rev. W. W. Gill on 
the origin of the, 1875, 173 
*South Wales mineral basin, A. Bassett 
on the, 1864, 50 
Southampton artesian well, T. W. Shore 
and E. Westlake on the, 1882, 547 
-Docks, A. Giles on the, 1882, 669 
-new dock excavation, beds exposed 
in the, T. W. Shore on the, 1888, 672 
-water, Dr. A. Angell on the brown 
colouration of the, 1882, 589 
Southport, a human skull found near, Dr. 
W. G. Barron on, 1883, 562 
-as an example of modern enterprise, 
F. Norfolk on, 1883, 630 
—— notes on geological sections within 
forty miles radius of, by C. E. De Ranee, 
1883, 489 
- sands, the Annelides of the, Dr. 
Carrington on, 1883, 544 
-sewage, I. Shone on, 1883, 656 
Southward (J.), a rotary machine for 
composing and distributing printing 
type, 1890, 951 
Space, notion of, and composition of sen¬ 
sation, L. de la Rive on, 1888, 585 
* - numbers : an extension of arith¬ 
metic, B. H. Hinton on, 1878, 486 
-points and lines in, Prof. A. Cayley 
on a correspondence of, 1870, 10 
Spaces, ‘analysis situs’ of threedimen¬ 
sional, Prof. W. D} r ck on the, 1884, 
648 
Spain and her colonies, A. de Marcoartu 
on commercial relations of Canada 
with, 1884, 870 
-the resources and progress of, during 
the last fifty years of representative 
government in connection with the 
British Empire, A. de Marcoartu on, 
1886, 784 
- and Portugal, W. S. Kent on the 
zoological results of the dredging- 
expedition of the yacht ‘ Noma ’ off 
the coast of, 1871, 132 
Spalding (D. A.) on instinct, with ori¬ 
ginal observations on young animals, 
1872, 141 ; *1875, 63 
* -on free trade in labour, 1875, 220 
Spanish territories of North America, 
E. von Hesse-Wartegg on the, 1882,627 
* -mining, A. de Marcoartu on, 1876, 
207 
Sparrow, Dr. Edwards Crisp on the food 
and habits of the, 1865, 85 
Species, decay of, and on the natural 
provisions for extending their duration, 
Dr. Daubeny on the, 1864, 87 
-origin of, H. Fawcett on the method 
