REPORT 



Of the Boulder Committee of the Ohio Academy 

 OF Sciences. G. F. Wright, Chairman. 



The identification of the various sources from which 

 the glacial boulders of Ohio have come is beset with 

 difficulties ; yet it is not beyond reasonable expectation 

 that many very interesting and important results may 

 eventually be attained. The present report is issued in 

 its imperfect condition in order to stimulate investiga- 

 tion and to serve as a basis for the co-operation of the 

 large number of persons in the State \vho may easily 

 render important service to the cause. Three things 

 are involved in the work ; but those who do any one of 

 them will render important service. 



1st. The collection of specimens of boulders. The 

 place of their discovery should be noted, and the 

 specimen properly labelled. It would be well, also, to 

 note the size of the boulder from which it was taken, 

 and the comparative frequency with which boulders of 

 a similar character occur. If some common standard 

 of names can be emplo\'ed, it will enable us to compare 

 specimens without exchange. 



2d. The collection of fragments of rock from the 

 original outcrops to the north over which the glacial 

 ice has moved. Considerable progress in this direction 

 w^as made in the summer of 1892 in an expedition 

 undertaken by myself in compan\' with Prof. A. A. 

 Wright, Judge C. C. Baldwin, and Mr. D. C. Baldwin. 

 We made a rapid survey of the country' extending along 

 the line of the Canadian Pacific R. R. from Sault-Ste- 

 Marie to the Ottawa River where it is joined by the 

 Mattawa, making a detour northward to the vicinity 

 on Onaping. A large number of specimens were 

 brought back both from the ledges exposed and from 

 boulders scattered over the surface, which had come 



