764 REVIEWS 
but incidentally. The present active geological survey of Mexico has a 
practically new field, and in view of this and the difficulties of commu- 
nication over much of the republic, the rapidity of its publication and 
the high class of the work, deserve the heartiest recognition. Among 
the publications of the survey the present one will for sometime to come 
rank among the more useful. Jalsa, JB. 
Geological Survey of Kansas, Vol. Il, 1598. By Dr. E. Haworth, 
geologist, and Mr. W. R. Crane, assistant geologist and 
chemist. 
Volume III is a special report on Kansas coals and treats of the 
coal mines and coal mining of the state in all their various aspects. 
The volume is divided in two parts. 
Part I is by Dr. Haworth and deals with the general stratigraphy of 
the Kansas Coal Measures. Numerous detailed accounts of the strata are 
given to enable the reader to understand the general geological con- 
ditions of the Coal Measure area of the state. The geology of the area 
is further shown by the records of many deep wells with drawings illus- 
trating the strata as shown by the wells, and in addition to these many 
geological sections crossing the state in different directions are given. 
The following facts are gleaned from Dr. Haworth’s report. The 
Mississippian or subcarboniferous outcrop occupies an area of about forty- 
five square miles in the extreme southeastern part of the state. The 
strata dip under the other formations of the state and their westward 
inclination is about 17 feet per mile, on the average. The Coal Mea- 
sures proper occupy the eastern third of the state and constitute a 
mass of alternating layers of limestones or sandstones and shales 
aggregating 3000 feet in thickness. The limestones are similar in 
general character but the lower ones are more nearly crystalline, of 
finer texture, and denser in appearance. The following divisions of 
the Coal Measures, named in order from lowest to highest, are recog- 
nized: (1) The Cherokee shales; (2) The Oswego limestone ; (3) The 
Labette shales ; (4) The Pawnee limestone ; (5) The Pleasanton shales ; 
(6) The Erie limestone; (7) The Thayer shales; (8) The Iola lime- 
stone; (9) The Lane shales; (10) The Garnett limestones ; (11) The 
Leroy shales; (12) The Oread limestone ; (13) The Lecompton shales 
and Elgin limestone. 
