8. 
ment when known) ; in the third, lustre; fourth, color; 
fifth, hardness; sixth, streak; seventh, fracture and 
cleavage; eighth, tenacity; ninth, crystalline system; 
tenth, fusibility, and eleventh, specific gravity. It will 
be seen at once that with these properties known, the 
identification of any mineral described is made quite cer- 
tain. 
Part IV treats on the subject of “Naming Rocks.” 
The more common rocks only are described and in such a 
way as in most cases to admit of at least approximate 
identification when met with. A Glossary of Mining 
Terms forms the next subject, then follows an arrange- 
ment of mineral collections, models, assay and blowpipe 
outfits. This concludes the work. 
G. W. Mitumr, Butte, Mont., May 1st, 1901. 
PUBLISHERS’ NOTE ON SECOND EDITION 
In placing before the public the second edition 
of Mr. Miller’s work, we desire to state that the de- 
mand for the Field Book of Practical Mineralogy 
has far exceeded our expectations. Though we 
realized from the start that the work filled a recog- 
nized gap in mining literature, we were. not pre- 
pared for the widespread interest with which it was 
greeted, not only in America but throughout the 
entire world where the mining industry thrives. 
One book sent to a locality has almost invariably 
been followed by a shower of orders, so immediate is 
the appreciation of the value of Mr. Miller’s labors 
among practical miners and prospectors everywhere. 
As a time saver, presenting in concrete and conven- 
ient form the facts of mineralogy from the miner’s 
standpoint, this little volume appears to occupy a 
field peculiarly its own. ° 
THE PUBLISHERS’ PRESS ROOM CO. 
Denver, Colorado, May 1, 1902. 
