476 
Vulpie acid, on the preparation and 
constitution of, 211. 
tise (F. O.) on the psenio- diascope, 
ered from the coal-strata, on the 
composition of, 330. 
Waterston (J. J.) on the heat en- 
gendered by the possible fall of a 
meteor into the sun, 338. 
Wiedemann (G.) on the conductibility 
of certain alloys for heat and elec- 
tricity, 243. 
Wood (S. V., jun.) on the probable 
events which succeeded the close of 
the Cretaceous period, 319. 
END OF THE 
INDEX. 
Woods (Dr. T.) on a new actinometer, 
39 
Woolhonse (W. S. B.) on the deposit 
of submarine cables, 345. 
Wright (Dr. S.) on the behaviour of 
mercury as an electrode, 129. 
Wright (Dr.) on the lower lias of the 
south of England, 400. 
Wurtz (M.) on new derivatives of gly- 
col, 123; on a series of new bases, 
125. 
Xanthine, on the occurrence of, in 
muscle and in the pancreas, 213. 
NINETEENTH VOLUME. 
PRINTED BY TAYLOR AND FRANCIS, 
RED LION COURT, FLEET STREET. 
