

INDEX Il. 
_ primary origin and. subsequent forma- 
tion, 100. 
Salter (J. W.) on the lowest fossiliferous 
beds of N. Wales, 56; on a few genera 
of Irish Silurian fossils, 59. 
Samoied family, description of a, seen at 
Archangel, 84, 
Sandstone, yellow, on the fossils of the, of 
the S. of Ireland, 43. 
Saull (W, D.) on the supposed action of 
water in geological formations, and the 
position of the poles of the earth, 61. 
Saunders (Captain J,), design for safety 
harbours, 129. ' 
Scotland, on the fossil remains of the lower 
_ Silurians of the south of, 48; on the 
structure of certain fossil fishes found 
in the old red sandstone of the north 
of, 55; on the structure of the South 
Silurian mountains of, 7b. ; on the condi- 
tions under which boulders occur in, 
61; on the present state of the law of 
settlement and the removal of paupers 
in, 114, 
Sea, on an improved form of reflecting 
instrument for use at, 12; on telegra- 
phic communications by land and, 121. 
Seleucia in Pieria, on the ancient harbour 
of, 98. 
Sepiola, on a species of, new to Britain, 
and first procured in the neighbourhood 
of Belfast, 73, 
Sertularian zoophytes, on the character of 
the, 78. 
Shaw (Dr.),. commercial documents re- 
lating to the eastern horn of Africa, 
113. 
Shells found in the alluvial deposits of 
Belfast, on the, 42; catalogue of the, 
found, in the alluvial deposits of Bel- 
fast, 74. 
Ship canal to the East Indies through the 
Dead Sea, on a, 97, 
Ships, on placing compasses on board iron, 
Silurian fossils, on a few genera of Irish, 
59. 
Silurian. mountains of Scotland, on the 
structure of the south, 55. 
Sleep, on the state of the mind during, 
80. . 
Smith (James) on the conditions under 
which boulders occur in Scotland, 61. 
Smith (W. H.) on the natural peculiarities 
and advantages of the mineral field and 
the proposed harbour of FairHead, 129. 
Smyth (Prof. C. Piazzi) on an improved 
form of reflecting instrument for use at 
sea, 12 ; on thered prominences seen du- 
ring the total solar eclipse of 1851, 18; 
143 
remarks proposed by, on the mechanical 
process for cooling air in tropical cli- 
mates, 128; on Penrose and Bennett’s 
sliding helicograph, 129. 
Soda, on the discovery of minute quan- 
tities of, by the action of polarized light, 
33, 
Solar eclipse of 1851, on the red promi- 
nences seen during the total, 13. 
Spain, on the geological structure of, 
62. 
Stanger (Dr. W.) on certain furrows and 
smoothings in the surface of granite, 
caused by drift sand, at the Cape of 
Good Hope, 61. 
Statistics, 114. 
Steam-boat building in the Clyde, on the 
progress and extent of, 120, 
Stereoscopometer, on the, 6. 
St. Ives, on the geology of, 63. . 
Stokes (Prof.) on the optical properties of 
a recently discovered salt of quinine, 
15; on the application of certain opti- 
cal phenomena to chemistry, 39. 
Strachey (Capt.) on the formula for the 
wet-bulb thermometer, 31, 
Strang (John) on the progress and extent 
of steam-beat building in the Clyde, 
120. 
Stygina, new genus of, 59, 
Sunbeams, on converging, 12. 
Sun-fish, on the oil of the, 39. 
Sykes (Lieut.-Col.) on the possessions of 
the Imaum of Muscat, and on the cli- 
mate of Zanzibar, with observations on 
the prospects of African discovery, 113; 
on the census and condition of the island 
of Bombay, 120. 
Sylvia'Tithys, on a singular locality chosen 
for its nest by the, 71. 
Synge (Capt.) on the most rapid commu- 
nication with India, vid British N, Ame- 
rica, 114, 
Syria, Jate explorations in, 114. 
Talpina?, on the discovery of a new, 55. 
Taylor (Dr. J.) on tropical hurricanes, 
31, 
Teas of commerce, on the black and green, 
69. 
Telegraphic communications, by land and 
sea, on, 121; between Great Britain 
and Ireland, by the Muil of Cantyre, 
128 05 4. 
Telegraphic time signals, on, 181. 
Tennant (Prof.) on the Koh-i-noor dia- 
mond, 39, 
Textile fabrics and other substances, on a 
dynamometric machine for measuring, 
128, 
