412 Scientific Intelligence. 
still to be dissipated by radiation. The author then brings his 
views into contact with various known facts of vulcanology and 
seismology, showing their accordance. : 
e also shows that to the heat developed by partial tangential 
thrusts within the solid crust are due those perturbations of hypo- 
geal increment of temperature which Hopkins has shown cannot 
eferred to a cooling nucleus and to differences of conductivity 
alone. He further shows that this view of the origin of volcanic 
heat is independent of any particular thickness being assigned to 
the earth’s solid crust, or to whether there be at present a liquid 
fused nucleus, all that is necessary being a hotter nucleus than 
far unexplained fact that the elevations upon our moon’s surface, 
and t 
vast when compared with those upon our globe. 
Finally, he submits that if his view will account for all the 
7. Solvent action of water. From the Anniversary Address of J. 
Prestwich, President of the Geological Society, February, 1872.— 
ed with the solvent action of the water on the strata it bndinin 
The analyses, made for the Commission by Drs. Frankland an 
ames 
water at Ditton gives 20-78 grains per gallon of solid residue. It 
was also shown by Drs. Letheby and baling and Professor Abel 
that the unfiltered waters of the Thames Companies, which take 
oO 
ORS Sp SE Ae a gee a Ae pea 
