Geology and Natural History. 517 
flowed fifteen months; but this rent the mountain laterally and 
flowed longitudinally ; whereas the present eruption has, as far as 
we know, made no lateral vent and found no outlet. -The actio 
. vertical, and it is simply a gigantic mountain-pot of boiling 
vas, 
Can you tell what sustains these Plutonic fires, and lifts those 
burning columns and agitates that fiery abyss at the height of 
nearly 14,000 feet ? What are the forces basco ove or shake 
with so terrific power the foundations beneath us ? 
Kilauea, during all this time, has been oneal a active. Some- 
times the action has been intense and the illuminations brilliant ; 
and again Madam Pele has been quiet. 
ut the great depression in Kilauea, caused by the gh of 
1868, is fast filling up by repeated overflows from the south lake, 
while, all around that lake, a vast mound is rising, whose summit 
is nearly as high as the southern rim of Kilauea, and it may soon 
overlook it. 
ake Mineral resources and Geology = the State of Quere- 
taro, Mexico , by SeXor Marrano Barc A memoir (in 
Spanish) presented to the Director of the School of Engineers, 
Mexico, and published creas the direction of the Minister of Jus- 
tice and Public Instruction. 28 4to. Mexico. 1873.—After 
describing the mineral localities of Queretaro, which include mines 
of gold, cinnabar, native silver an tetrahedrite, galena and man- 
n a form 
geology and physical geography of the State. He distinguishes 
three formatio ie the Orecavecun, Pattiaey and Quaternary. The 
Cretaceous extends across the State from east to west, and con- 
tains fossils of the genera Crania, Hippurites, Nerinwa, and other 
ret orms. The occurrence of these Cretacéous beds 
Shows that the region of the Sierra Gorda was submerged dur- 
ing that period. The erste Sr rocks of the State belong for 
the most part to the Tertiary period 
Remains of the Mastodon and Elephant occur in the monrevige. 
of the valleys. Following the geological chapters are others 
0s snemestee Flora and Fauna, Statistics and History of the 
a is much to be desired that the work ,which Sefior Barcena has 
8o ably performed for Queretaro, should be extended by others 
ee all wah Mexican States. 
4. Report of Progress of the Geological Survey of Canada, 
Sor 173-1875; Aurrep C. Srrwyn, F.G.S., Director. 300 pp. 
8vo. Montreal, 1873. (Dawson Bros os.)—This volume contains 
Reports by Mr. Selwyn, the Director of the Survey, J. Richardson, 
Dr. Dawson, Mr. E. Billings, Dr. Harrington, Mr. Robert Bell, 
Mr. MeQuat, Mr. H. G. Vennor; on part of New Brunswick, by 
Prof. Bailey’ and Mr. Matthew ; on the coal mines of a Breton 
by Mr. Charles Robb, Mr. Selwyn, in his notes on a Geological 
ebonn naisance from Lake Superior to Fort Garry, remarks respect- 
