144 
Vision, on Berkeley's theory of, 6. 
Virginia, general sketch of, 65. 
Voelcker (Dr. A.) on the composition of the 
ash of Armeria maritima, grown in different 
localities, and remarks on the geographical 
distribution of that plant, and the presence 
of fluorine in plants, 43. 
Voltaic arrangements, on the comparative 
cost of working various, 47. 
Voluta abyssicola, 65. 
Volutes, on the discovery of a living repre- 
sentative of a small group of fossil, occur- 
ring in the tertiary rocks, 64. 
Wages and prices during the years 1842— 
1849, on a comparative statement of, 101. 
Walenn (W. H.) on a form of galvanic bat- 
tery, 45. 
Ward (W. Sykes) on motions exhibited by 
metals under the influence of magnetic 
and diamagnetic forces, 46. 
on a theory of induced electric cur- 
rents, suggested by diamagnetic phzno- 
mena, 46. 
on the comparative cost of working 
various voltaic arrangements, 47. 
on a method of supplying the boilers of 
steam-engines with water, 132. 
Warwick asylum for juvenile offenders, on 
the, 87. 
Warwickshire, on a new species of Labyrin- 
thodon from the new red sandstone in, 56. 
Water, on the friction of, 3. 
, on a new method of ascertaining the 
quantity of organic matter in, 37. 
, on the decomposition and partial solu- 
tion of minerals, rocks, &c. by pure, and 
water charged with carbonic acid, 40. 
meter, on a, 125. 
Waters of the Firth of Forth, the Firth of 
Clyde, and the German ocean, on the pre- 
sence of fluorine in the, 47. 







INDEX II. 
Wave, on a singular atmospheric, in Feb. 
1849, 29. 
West (W.) on the presence of nitrogen in 
mineral waters, 47. 
Westminster (the Dean of), on the cause of 
the general presence of phosphorus in strata 
and in all fertile soils, also on Pseudo-co- 
' prolites, and the conversion of the contents 
of sewers and cesspools into manure, 67. 
Wheatstone (Prof.) on Prof. Quetelet’s in- 
vestigations relating to the electricity of 
the atmosphere, made with Peltier’s elec- 
trometer, 11. 
Wheels, on correct sizing of toothed, 127. 
Whishaw (Mr.) on chain pipes for sub- 
aqueous telegraphs, 152. 
on the present state of electro-telegra- 
phic communication in England, Prussia, 
and America, 133. 
Whitby (Mrs.) on the growth of silk in En- 
gland, 81. 
Williams (Rev. D.) on an original broad 
sheet of granite, interstratified among slates 
with grit beds, between Falmouth and 
Truro, 68. 
Wilson (Dr. G.) on the presence of fluorine 
in the waters of the Firth of Forth, the 
Firth of Clyde, and the German ocean, 
47. 
Wire-gauge, 28. 
Wood (Mr.) on Kosman’s patent cistern as a 
sanitary machine, 134. 
Wrightson (F. C.), analytical investigations 
of cast iron, 49. 

Yorkshire, on tumuli in, 86. 
Zetland, mollusca collected in, 78. 
Zoology, 68. 
Zoophytes,.on the discovery of beds of Keuper 
sandstone containing, in the vicinity of 
Leicester, 64. 
THE END. 
PRINTED BY RICHARD AND JOHE LE. TAYLOR, 
RED LION COURT, FLEET STREET. 

