512 THE JOURNAL OF GEOLOGY, 



for several years by its author, Professor R. P. Whitfield, and 

 was then published with the consent of Professor Newberry, in 

 the annals of the New York Academy of Science. 



There now remained to be prepared and published two of the 

 volumes embraced in the original plan of the Chief Geologist, 

 viz., the volume on Agriculture, Botany, and Zoology, designated 

 Volume III., and that on Economic Geology, designated Volume 

 IV. The first of these, which it was now necessary to call 

 Volume IV., was published in 1882 with a title abbreviated from 

 the original plan, and which the facts of the case required to be 

 still further shortened. No special report had been prepared 

 upon the subject of Agriculture, though more or less material 

 bearing upon this subject is to be found in the separate county 

 reports, and, by what has proved to have been a fortunate 

 accident, the manuscript of the botanical list which had been 

 prepared was mislaid and could not be found in time for the 

 printer. The volume, therefore, is entirely confined to the sub- 

 ject of Zoology, and, even in this, only the leading divisions of 

 the animal life of the State are included. The volume that was 

 to be devoted to "Agriculture, Botany, and Zoology," and which 

 appears under the title Zoology and Botany, thus turned out to 

 be a report on the Vertebrates of the State. Dr. Wheaton's list 

 of the birds of Ohio may, however, be noticed as especially com- 

 plete and authoritative. Professor Newberry had by this time 

 virtually withdrawn from actual connection with the survey, 

 being hopeless of securing the appropriations necessary for the 

 execution of his plans. In 1882, however, the Legislature, which 

 looked with special interest to the volume on Economic Geology, 

 made provision for its publication, but put the work into' my 

 charge, Professor Newberry turning over such matter to me as 

 he had accumulated for this purpose. In 1884, the long-delayed 

 volume, now entitled "Volume V., Economic Geology," was 

 issued. 



Just at this time the remarkable discoveries of gas and oil 

 in the Trenton limestone of northwestern Ohio were in progress, 

 and were awakening a greater interest in geological questions 



