PREFACE. 
epee appearance of this report has been greatly delayed, 
from causes which were unavoidable. Doctors Crane 
and Rogers had their parts completed and submitted three 
years ago, and, in a measure, they are out of date as a result 
of the delay. This is particularly true of the report by Doc- 
tor Crane, as methods of mining and ore handling have 
changed to a considerable extent during those three years. 
The field-work for the report was begun during the summer 
of 1898 and has been continued somewhat intermittently to 
the present time. Dr. W. R. Crane and Dr. A. F. Rogers 
have been my principal assistants in field-work and in the 
preparation of the report, but Messrs. D. F. McFarland, O. 
F. Stafford and Charles McClair were associated with us dur- 
ing the field season of 1899 as volunteer assistants. Each of 
them did excellent work. 
In addition to the above-named gentlemen, great assistance 
has been rendered by many mine operators and laborers 
throughout the entire mining district examined, to all of 
whom I wish to express special thanks. No geologist ever 
received a more friendly greeting and a warmer welcome 
while examining mining properties than were shown to all of 
us by the various mine operators and laborers. 
K. Hi. 
UNIVERSITY OF KANSAS, July, 1904. 
(xv) 
