GEOLOGICAL SURVEYS OF OHIO. 513 



throughout the State than there had ever been before. The 

 Legislature was, therefore, easily persuaded to extend the 

 investigations on the economie geology of the State so as to 

 include these recent discoveries. As a result, a "Preliminary 

 Report on Petroleum and Inflammable Gas " was published in 

 1886, and in 1888 the completed volume, entitled Volume VI., 

 Economic Geology, was issued. 



The work of the second survey was thus being gradually 

 merged in the work of a new organization ; and, in 1889, formal 

 provision was made for carrying on geological work henceforth 

 on a new basis, which may be called the Third Geological 

 Survey of Ohio. Continuous work on a small scale was pro- 

 vided for, or rather, it was made possible for the State Geologist 

 to keep the track of such development as was going forward and 

 to present the facts in annual reports. The first report under 

 this plan was published in 1890, and is entitled " First Annual 

 Report, Third Organization." Before the second report was due, 

 I was disabled by illness to such an extent that I could no longer 

 carry on the active duties of State Geologist. Considerable 

 material had, however, accumulated in my hands during the 

 preceding year, and there were also several unfulfilled promises 

 and obligations of the Second Geological Survey which it was 

 now found possible to execute. Accordingly there has been 

 printed, and is now in the binder's hands, a volume entitled 

 Volume VII., the first part of which is devoted to Economic 

 Geology, and which may be considered the equivalent of the 

 second and third annual reports, and the second part of which is 

 mainly occupied with the fulfillment of pledges to the State 

 made by the Second Geological Survey. This part contains a 

 chapter on the Archaeology of Ohio, which was repeatedly 

 promised by Dr. Newberry, and also the "Botany" mentioned 

 above, viz., a list of the plants of the State, immensely superior 

 to the list that was lost ten years ago ; and also two chapters on 

 Paleontology which were prepared for Volume III., but which, 

 as will be remembered, the Legislature had refused or failed to 

 publish. Several other chapters in the same general line have 



