REVIEWS 
The Oil and Gas Resources of Kentucky. By WiILLARD ROUSE 
Juttson, Kentucky State Geologist. Department of Geology 
and Forestry, Frankfort, Ky. 1919. Pp. 630. 
This volume is a review and summary of the known oil and gas 
resources of Kentucky, found in strata ranging from the Ordovician 
to the Pennsylvanian. The “‘Calciferous’? (Lower Ordovician) con- 
tains a small amount of oil and gas, but it is doubtful if it will ever be 
important commercially. The “Trenton” formation (Middle Ordo- 
vician) is an important source of oil, and the Cincinnatian has yielded 
some. The “Niagaran” (Silurian) is productive, but the Onondagan 
formation (‘‘Corniferous,’”’ Middle Devonian) holds first place in the 
production of petroleum and natural gas in the state. The ‘Black 
Shale” (Upper Devonian) does not yield petroleum in commercial 
quantities, but some gas has been derived from it. The Waverly series 
(Lower Mississippian) contains oil and gas sands of importance. The 
St. Genevieve (=St. Louis limestone, Middle Mississippian) has not 
yielded petroleum on a commercial scale, but has yielded much gas. 
The Chester or Mauch Chunk formation (Upper Mississippian) is a 
good producer in eastern Kentucky. Both oil and gas occur in the 
Pottsville Conglomerate (Pennsylvanian). Neither petroleum nor gas 
is known to exist in formations younger than the Pennsylvanian, within 
the state. Roe Aae 
Descriptive Mineralogy. By W. S. BAytEy. Appleton & Co., 
HO. IOs FAA= prem, 8.5. 
To quote from the Preface, “The following pages are presented 
with the purpose of affording students a comprehensive view of modern 
mineralogy rather than a detailed knowledge of many minerals. .... 
The volume is not a reference book. It is offered solely as a textbook.” 
Bearing these statements in mind, the work is one which may be highly 
commended, especially since it does not invade an overcrowded field. 
As the title indicates, it is almost purely a descriptive mineralogy, 
lacking a discussion of crystallography, but containing material on the 
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