158 
Spineto (Marquis) on the results of 
trials made for water in the desert 
between Suez and Cairo, 66. 
Statistics, 136. 
Steam navigation, mechanism of waves 
in relation to, 130. 
Strickland (H. E.) on the nature and 
origin of transported gravel, 61. 
Sulphate of iron and copper of Crone- 
bane copper mine, 47. 
Survey for level, from Bridgewater to 
Axmouth, 59. 
Suspension bridge, flexible, 132. 
Taylor (J.) on the duty of the Cornish 
engines, 133. 
Taylor (Dr. W. C.), report of the Uni- 
versity of New York, 139. 
Thomson (Dr.) on the specific heats 
of nitric acid and aleohol, 43. 
Tidal capacity of the Mersey, 85. 
Tidal rivers, on improvements in, 181. 
Tides, on, 4; of Dundee and Glasgow, 
5 
Traill (Dr.) on an antimonial com- 
pound applicable as a pigment, 58. 
on the geology of Spain, 70. 
, notice of Argas Persicus, 98. 
Tunnels, ventilation of, 136. 
Undulatory theory of light, 16. 
Uric acid, on the products of the de- 
composition of, 38. 
Urquhart (Mr.) on the plague in Con- 
stantinople, 139. 
Ventilation of tunnels, on the, 186. 
Voltaic action, crystallization of metals 
by, 45. 
INDEX II. 
Walmsley (Mr.) on the state of crime 
in Liverpool, 139. 
Warren (Dr.) on some crania found in 
North America, 108. 
Watson (B. L.) on telegraphic com- 
munication on railways, 131. 
Waves, mechanism of, in relation to 
steam navigation, 130. 
West (W.) on the ventilation of tun- 
nels, 136. 
Wheels, on the teeth of, 135. 
Whewell (Rev. W.) on tides, 4. 
on the principle of his anemo- 
meter, 32. 
Williams (Dr. D.) on limax variega- 
tus in the human intestines, 98. 
Williams (Rev. D.) on some fossil wood 
and plants discovered low down in 
the grauwacke of Devon, 94. 
Williams (J.) on the Treffos pump, 
129. < 
Williams (Mr.) on preventing the dan- 
gers of collision, and of fire in vessels, 
153. 
Williamson (W. C.) on the coal-mea- 
sures of West Lancashire, 81. 
Willis (Prof.) on the teeth of wheels, 
135. 
Wrede’s explanation of the absorption 
of light, on, 16. 
Yates (J.) on fossil vegetables from 
the new red sandstone of Worcester- 
shire, 59. 
Yelloly (Dr.) on spade husbandry, 
139. 
York, state of education in, 144. 
Zoology, 97. 
END OF THE SIXTH VOLUME. 
LONDON: 
PRINTED BY RICHARD AND JOHN E. TAYLOR, 
RED LION COURT, FLEET STREET. 
