Monthly Author's Catalogue. 185 
isimilar in that respect to the cone upon which it rested, or through 
which it was protruded. 
The destruction of the tower began in July, 1903. It was ac- 
companied, and probably caused, by a more pronounced activity of 
the volcano, producing the dense black clouds which descended 
the mountain slopes to the sea and ai-e thought to be of the nature 
of the fatal blast that visited and destroyed Saint-Pierre. After the 
tower was destroyed, which required but few weeks, a huge dome 
began to rise in its place. This was made up more or less of lava 
.and was accompanied by frequent discharges of dust and boulders. 
It rose at about the same rate as the tower. It was sometimes 
incandescent. By October the dome had reached a hight of 500 
feet. Through it protruded small towers, more solid, believed by 
Heilprin to be the basal parts of the great tower. These, and the 
;great tower itself, he regards as protrusions of the old volcanic 
neck of Mont Pelee, dislodged from the place of its original con- 
solidation, and not the production of viscous lava consolidated in 
•situ as it slowly rose from the interior. The latter idea, however, 
:is maintained by the French commission headed by Prof. Lacroix. 
The author gives abundant evidence to support his idea of the na- 
ture and origin of the tower. 
The author gives a categorical statement of the wonderful 
phenomena of this volcanic eruption, comparing it with similar 
world-known eruptions, and concludes with some reflections on the 
-nature and origin of volcanoes, and the cause of explositions. He 
discards the idea of the entrance of surface waters to the heated 
Interior of the earth's crust, whether oceanic or land water, and 
"inclines to the idea of magmatic water escaping from the magma 
and from the hydrated rocks of the interior. His arguments are 
far from conclusive, but this is not the place to discuss them. 
N. H. W. 
MONTHLY AUTHOR^S CATALOGUE 
OF AMERICAN GEOLOGICAL LITERATURE 
ARRANGED ALPHABETICALLY. 
ALLEN, E. T (A. L. DAY and). 
Isomorphism and thermal properties of the feldspars. (Am. 
Jour. Sci,, vol. 19, pp. 93-142, Feb., 1905.) 
ANON. 
The Brontosaur; how a giant prehistoric animal was discovered, 
transported and restored. (Sci. Am., vol. 92, p. 42, Jan. 21. 1905.) 
ANON, 
A geological survey of minois. (Min. Eng. Jour., vol. 79. p. 
182, Jan. 2i6, T905.) 
