48 The American Geologist. January, looi. 
Eleutherocrania (new mut.), Pseudocrania, notes on six species al- 
ready described. Pseudometoptoma, notes on two species already des- 
cribed. 
A table of the vertical and horizontal distribution of the forms of 
this family is given and following this some interesting remarks on the 
systematic place of Pholadops. A few paragraphs also are devoted to 
the changes which occurred in Philhedra from its first appearance un- 
til it gave place to Craniella and Eleutherocrania in the Horizon F. 2. 
There are six text figures and three plates in illustration of the 
species treated of in this article, which add materially to its value. 
G. F. M. 
A text-book of important minerals and rocks, with tables for the de- 
termination of minerals. By S. E. Tillman. Octavo, pp. 176, $2.00. 
John Wiley and Sons, New York, 1900. 
After a brief account of the crystal systems, and of the common phy- 
sical and chemical properties of minerals, the author gives brief gen- 
eral descriptions of eighty-seven minerals or groups of minerals, especi- 
ally adapted to amateurs and economic mineralogists. Each mineral 
description is followed by a statement of the uses and localities where 
the mineral is most abundantly found. The tables for the determina- 
tion of minerals are compact and b^ndy, the primary divisions being 
based on color. They provide for the discrimination of 135 species. 
Part II. is devoted to a condensed description of common rocks. The 
work is adapted to an elementary course in mineralogy in schools and 
academies. It is not at all encumbered by technicalities nor by symbols. 
N. H. w. 
The Progress of Mineralogy in 1899, on analytical catalogue of the 
contributions to that science during the year. By S. Harbert Ham- 
ilton and James R. Withrow (Bulletin No. 2 of the American 
Institute of Mining Engineers, 1900.) 
This publication renders a distinct and noteworthy service to min- 
eralogy and to mineralogists. It is the only one of its kind that we 
know of in the English language. It is not restricted to the United 
States, nor to English literature, but embraces all countries and lan- 
guages. It is, however, confined to literature that was received in Phil- 
adelphia prior to the beginning of 1900. It is divided into seven essen- 
tial parts, each part arranged alphabeticallj' by authors' names, viz. : 
New minerals, new meteorites, new elements ; chemical mineralogy ; 
new analyses, determinations, methods etc. ; physical mineralogy ; new 
forms, determinations, crystallographic studies etc. ; general mineral- 
ogy; new occurrences, economic mineralogy etc.; lithology; new rocks, 
petrographical descriptions etc. ; bibliographical, historical etc. ; new 
books, new apparatus etc. 
In order to get this literature catalogued the authors have consulted 
175 different serial publications from all parts of the world, a fact 
which shows that a journal devoted exclusively to mineralogy should be 
well supported and a great advantage. Besides its own articles such a 
journal should annuallj' contain such a document as this. N. H. w. 
