126 The American Geologist. August, looi 
nomcna. It has, besides general maps, special maps of volcanoes and 
photographic views of some of their scenery; also a bibliography of the 
chief literature. n. h. \v. 
The Coal and ^h-tal Miner's Tockctbouk of Principles, Rules. Tonnu- 
las and Tables. The Colliery Engineer Company, Scranlon, Pa. 
Sixth edition, revised and enlarged with original matter. iQOO. 
'J'his handy and gilt-edged little volume is fully described by its 
title. It is printed on fine, calendered paper in solid nonpareil type, 
and contains in small space a vast amount of technical information. 
It contains a glossary in which are definitions of many Mexican and 
Cornish terms. This glossary, however, is almost destitute of geolog- 
ical and mineralogical terms. It is apparent that no geologist had 
part in its compilation. ''Archean' is defined as "an early period of 
geological time." Any geologist would have said the earliest period 
of geological time. The presence, moreover, of such a definition *as 
this: "Argol — A crude tartar deposited from wine," is almost a 
demonstration that some expert other than the geologist selected the 
terms of this glossary, for no geologist would assume that such crude 
tartar has any relation to coal or metal mining. n. h. w. 
Report on the Geology of the Philippine Islands. George F. Becker. 
(From the 2ist Annual Report of the United States Geological 
Survey. Washington, igoi.) 
Mr. Becker has admirably begun the Governmert's geological work 
in the Philippines. He has catalogued all earlier geological publications, 
of whatever nationality, and his deduced from them a compact sketch 
of what is known of the geological structure and history of the en- 
tire group of islands. At the same time he has added his own obser- 
vations, and has given to the whole interesting sketch a decidedly orig- 
inal and American clearness, as well as completeness. 
In the eastern part of Luzon, and of other islands, are crystalline 
schists and massive rocks, gneiss, granite in small quantity, possibly 
some syenyte, while diorytes, diabases and gabbros are abundant. Sim- 
ilar formations are found in the eastern portion of other islands. 
Some of these rocks may be Archean, by analogy with the geology 
of Borneo and of Java, but the diabases and gabbros are thought to be 
mainly post-Carboniferous. 
Of stratified rock. Dr. Becker states that none are known of pre- 
Tertiary age — although they may exist, and do exist in adjacent island 
groups to which the Philippines seem to be allied in one geological 
province. The Eocene is supposed tO' exist, but it is not well authenti- 
cated. Certain black lignites have been reasonably supposed to be of 
the Eocene, and that would require the Eocene through the southern 
provinces of Luzon, and in the Visayas. The Miocene seems to have 
a basal conglomerate, indicating non-conformity on the Eocene. Other 
strata are considered Pliocene and post-Pliocene. The islands have re- 
ceived a recent uplift, after peneplanation, thus forming extensive 
plains that are fertile, and thickly settled. This uplift began in the 
