GENERAL INDEX. 
381 
Silurian series of the North of England, 
Prof. H. A. Nicholson and C. Lapworth 
on the central group of the, 1875, 78 
-strata in Red River Valley, Mani¬ 
toba, gleanings from outcrops of, J. H. 
Panton on, 1884, 715 
♦Silva (R. D.) on the action of I 13 driodic 
acid on mixed ethers of the general 
formula C n H 2)l+ i + 0 . CH 3 , 1876, 68 
♦ -on the synthesis of diphenyl propyl, 
1879, 293 
♦Silver (Messrs.) on telegraphic wires, 
1861, 269 
Silver, the causes affecting the reduction 
in the cost of producing, Hyde Clarke 
on, 1886, 767 
- the depreciation of, and a gold 
standard for India, S. Mason on, 1876, 
207 
-depreciation of, in India, Dr. W. N. 
Hancock on the importance of extend¬ 
ing the British gold standard to India, 
as a remedy for the inconvenience of a 
rapid, 1876, 198 
- dilemma, J. Matheson, iun. on the, 
1876, 207 
-fall in the gold price of, L. C. Pro- 
byn on the effects on Indian exports 
of the, 1888, 768 
-question, the, and the double versus 
the single standard, W. Westgarth on, 
1881, 759 
-chloride, the effects of the spectrum 
on, Capt. Abney on, 1881, 594 
■ -coinage, British, W. C. Roberts on 
the molecular arrangement of the alloy 
of silver and copper employed for the, 
1871, 80 
■ - crystals of, J. H. Gladstone on, 
1871, 71 
♦ - extraction of, from sea-water by 
means of electricity, J. C. Bowring on 
the, 1865, 28 
- extraction of, J. A. Phillips on 
Claudet’s process for the, 1870, 61 
-filiform native, Dr. J. H. Gladstone 
on, 1872, 75 
♦—— horn, W. C. Roberts on, 1873, 66 
——- the mobility of, in molten lead, 
Prof. W. C. Roberts on, 1883, 464 
--nitrate of, J. H. Gladstone and A. 
Tribe on the corrosion of copper plates 
by, 1871, 29 
♦ -nitrite of, J. W. Gatehouse on, 1875, 
43 
-precipitation of, by copper, A. Tribe 
on the, 1872, 84 
-a new process for separating, from 
copper contained in copper ores and 
reguluses, W. Henderson on, 1880, 546 
-the quantity of deposit of, produced 
by the development on a photographic 
plate, in terms of the intensity of light 
acting, Capt. Abney on, 1889, 493 
Silver and mercury, separation of lead, T. 
Fairley on the, 1875, 42 
- sulphate, note by P. Braham on, 
1880, 550 
- and gold : their geological distribu¬ 
tion and their probable future produc¬ 
tion, W. Topley on, 1887, 510 
Sim (Col. E. C.) on the erosion of the 
South-eastern coast of England , 1885, 
410 ; from Beachy Headto Hastings, 437 
* - (Dr. Robert) on certain quartz- 
nodules occurring in the Crystalline 
Schists, near Killin, Perthshire, 1872, 
122 
* Sim,’ Dr. Charnock on the Gipsy dialect 
called, 1872, 177 
♦Simms (Dr.) on the physiognomy of the 
ear, 1875, 178 
Simons (W.) on an elevating steam ferry, 
1876, 233 
Simosaurus pusillus (Fraas),a step in the 
evolution of the Plesiosauria, Prof. H. 
G. Seeley on, 1881, 618 
♦Simpson (Prof. Maxwell) on the chlor- 
bromides and bromiodides of the oleo- 
fines, 1874, 67 
-Address to the Chemical Section, 
1878, 501 
-and Dr. A. Gautier on a compound 
formed by the direct union of aldehyde 
and anhydrous prussic acid, 1867, 40 ; 
on the formation of succinic acid from 
chloride of ethylidene, 42 
-(W.) on the Jellalabad region, 1879, 
443 
Simson (A.), notes on the Zaparos, 1877, 
121 ; from Guayaquil to the Napo by 
the Upper Patassa route, 148 ; on the 
ascent of the River Putumayo, South 
America, *1876, 184 ; 1887,149 
Sinai, Rev. F. W. Holland on the penin¬ 
sula of, and its geographical bearings 
on the history of theExodus, 1868, 135 
* - the supposed true site of, Major- 
Gen. Sir J. E. Alexander on, 1877, 141 
-Dr. C. T. Beke on the true position 
and physical characters of, 1873, 161 
Sinaitic Peninsula, Rev. F. W. Holland 
on the geology of parts of the, 1865, 62 
♦Sinclair (R. W.), recent additions to 
the list of Irish Lepidoptera, 1878, 572 
Sind, Sir Bartle Frere on the Runn of 
Cutch and the countries between Raj- 
pootana and, 1869, 163 
♦Singular solutions, Prof. H. J. S. Smith, 
on, 1875, 21 
-of differential equations of the 
first order which represents lines at 
infinity, Prof. P. Mansion on the, 1875, 
19 
Siphons, self-acting intermittent, and the 
conditions which (etermine the com¬ 
mencement of ti eiraction, B. Field on, 
1879, 223 
