LETTER OF TRANSMITTAL. 
To His Excellency, Joun H. Pattison, Governor of Oho: 
Str:—I have the honor to present to you Volume VIII of the Re- 
ports of the Geological Survey of Ohio. It consists First, of a Preface, 
dealing with the organization of the survey, the laws under which it oper- 
ates, its property and equipment, its publications, and its financial trans- 
actions, and Second, of three bulletins which have been prepared and pub- 
lished under my supervision, as follows: 
Bulletin I. On the Occurrence and Exploitation of Petroleum and 
Natural Gas in Ohio, by Professor John Adams Bownocker, 
ID, ‘SiGe 
Bulletin II. The Use of Hydraulic Cements, by Professor Frank 
lalayayexy Idiae), (C, 18, 
Bulletin III]. The Manufacture of Hydraulic Cements, by Professor 
Albert Victor Bleininger, B. Sc. 
These Bulletins have been issued singly as soon as published, accord- 
ing to the law, and their enthusiastic reception and continued sale has 
shown that they have met a popular and scientific need. They have there~ 
fore to some extent demonstrated the wisdom of the policy upon which the 
Survey has been operating and justified the expense to which the state has 
been put in preparing and publishing them. 
They are now put into this volume, as provided by the law, to bring 
them into a permanent form which shall be in harmony with the previous 
reports of the Survey. 
Very respectfully submitted, 
EDWARD ORTON, JR., 
State Geologist. 
Ohio State University, January, 1906. 
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