Salts, on the effects of heat on the colour 
of dissolved, 8; on the colour of, in 
Tare 
tures, 59. 
Schlagintweit (Hermann and Robert) 
on erosion of rivers in India, 89; on 
some of the animals of Tibet and India, 
106; on the routes pursued by them 
in India, the Himalayas, Tibet and 
Turkistan, 149; on some human races 
in India and Upper Asia, 151. 
Scotland, the quartz rocks, crystalline 
limestone, and micaceous schists of the 
N.W. Highlands of, proved to be of 
Lower Silurian age, 82; on the em- 
broidered muslin manufacture of, 167. 
_ Serew-propellers, on the resistance of, 
when revolving in water at different 
depths and velocities, 189. 
Sea, on meteorological observations made 
at, 28; on the use of percussion lights 
for preventing collisions at, 181. 
Sea-fisheries of Ireland, on the, 101. 
Sea-level, on the existence of forces capa- 
ble of changing the, during different 
geological epochs, 69. 
Secretions, on a more complete compila- 
tion of the facts illustrating the physi- 
ology of vegetable and animal, 110. 
Severn drift, on a fossil of the, 93. 
Sewage, London, on the condition of 
__ _ Thames water as affected by, 44. 
_ Ship-building, on the philosophy of the 
__-wave-line of, 188. 
Ship canal through the Isthmus of Suez, 
___on the proposed, 199. 
7 gies, early method of propelling, 182. 
_ Siegfried (Dr.) on an inscription in the 
language of ancient Gaul, and on the 
recent researches of Zeuss and others 
into that language, 154. 
Silicates, on the action of saline solutions 
on, under the influence of heat and 
pressure, 59. 
_ Silk, on machinery for spinning, from the 
__ cocoon, 189. 
‘Silver (T.)on the importance of regulating 
__ the speed of marine engines, 198. 
; Silver, ammonio-iodide of, 55. 
Simpson (John) on the temperature of the 
air registered at the ‘ Plover’s’ winter- 
quarters at Point Barrow, in the years 
1852-54; 37. 
'Sivash or Putrid Sea, on the, 148. 
lls discovered in an ancient sepulchral 
mound near Mount Wilson, Ireland,131. 
ity cleavage, on a model illustrative of, 
= 69, 
INDEX II. 
215 
Slieve-na-Muck, on a section across, 76. 
Smyth (Professor C, Piazzi) on lunar 
physics, 28. 
Smyth (Rear-Admiral) on the results of 
measurements of y Virginis for the 
epoch 1857, 32. 
Sorby (H. C.) on some facts connected 
with slaty cleavage, 92. 
Soret (M. Louis) on the correlation of 
dynamic electricity and the other phy- 
sical forces, 16. 
Sound, on the effect of wind on the in- 
tensity of, 22. 
South Wales, on the old red sandstone 
of, 73. A 
Stars, circumpolar, in the same vertical, 
on finding the time by observing, 24; 
on the light of temporary, 42. 
Statistics, introductory address by the 
Archbishop of Dublin, 154; on crimi- 
nal, 168, 171. 
Steam, on superheated, 199. 
Steam-engines, on improvements in the 
mode of working, 187. 
Steel, on improvements in, 180. 
Stigmaria, on fossil stems allied to, 69. 
Stokes (Prof.) on the effect of wind on 
the intensity of sound, 22. 
Stoney (Bindon B.) on the formation of 
the entrances to tidal basins, 198. 
Stoney (G. Johnstone), description of an 
arrangement of Grove’s battery, 20. 
Strang (Dr. J.) on the rise, progress, and 
value of the embroidered muslin manu- 
facture of Scotland and Ireland, 167; 
on the advantages arising from the 
improvement of tidal rivers as exem- 
plified by the state of the Clyde, ib. 
Structures, on the principle of the trans- 
formation of, 189. 
Suez, on the proposed ship canal through 
the Isthmus of, 199. 
Sugar, on a method of refining, 45. 
Sullivan (Prof. W. K.) on a process for 
the determination of the nitrates in 
plants, 58; on the presence of several 
acids of the series C? H" O* among 
the products of the distillation of peat, 
ib.; on tke solubility of salts at high 
temperatures, and on the action of 
saline solutions on silicates under the 
influence of heat and pressure, 59; on 
the influence which physical character- 
istics exert upon the language and 
mythology of a people, as a means of 
tracing the affinities of races, 153. 
Sun-dial, on a moveable horizontal, 24. 
Suns, on the light of, 42. 
Superphosphates, on the methods of ana- 
lysing the, 60. 
