No. 377:] REVIEWS OF RECENT LITERATURE. 379 
ments being known, for the complete characterization of the form. 
Thus the table of angles is vastly simplified, and reference to it for 
any newly measured form is easy. 
The present table contains, besides these two characteristic angles, 
¢ and p, for each form, several supplementary angles which facilitate 
the comparison of measurements made by the two methods, and also 
several linear values of use in plotting the gnomonic projection of 
the forms. 
An introduction contains necessary explanations of the values 
given in the tables and the schemes employed for each system for 
calculating the various values from the elements and symbol of the 
form. The total number of values tabulated is something over 
79,000, of which nearly oné-half required separate calculation, the 
remainder being such fixed values as 60 or 45 degrees. A summary 
of the number of minerals crystallizing in each system and of their 
forms is interesting. There are in 
Isometric System, 102 minerals with 719 simple forms. 
1 “ 47 “ “ 589 ‘“ “ 
Tetragona 
Hexagonal _ AT ee eo AR - 
Orthorhombic “ 170 sc $s OG “ 
Monoclinic ai t22 g Poar F re 
Triclinic 4 2I ne “ 464; © i 
Total 553 “ “ Sr 09 “ “ 
The publication of these tables removes one of the frequently 
urged objections to Goldschmidt’s instrument and method of calcu- 
lation, — that it had no connection with the great mass of observa- 
tions hitherto made and gave results which could not be directly 
used and compared with those of other observers. The contrary is 
now true, for this work brings together in simple form an enormous 
mass of results previously not nearly so accessible. It is a logical 
conclusion to the elegant system of crystal measurement and discus- 
sion which the author has developed and should do much to extend 
the use of his time and labor-saving methods among students of 
crystallography. 
Catalogue of Minerals. — Chester! has published a new edition, 
revised to date, of his list of minerals. It gives all the names in 
common use, stating of each whether it be a species or variety name, 
or a synonym. The approximate chemical composition is given after 
each species. The list serves as a convenient check-list, its alpha- 
betical arrangement increasing its usefulness in this way. 
1 Chester, A. H. 4 Catalogue of Minerals. New York, J. Wiley & Sons, 1897. 
