192 REPORTS ON INVESTIGATIONS AND PROJECTS. 



GEOLOGICAL EXPLORATION IN EASTERN CHINA. 



Willis, Bailey, U. S. Geological Survey, Washington, D. C. First 

 supplement to Grant No. 116. (For previous reports see Year 

 Book No. 2, p. XXXV, and Year Book No 3, p. 118.) $7,500. 



The field work of 1 903 and 1 904 resulted in notes and maps embod}'- 

 ing materials for publication concerning which recommendations- 

 were made in the report of October, 1904, to the effect that there 

 should be published : 



Report A. — Detailed geology ; a statement of observed facts, ar- 

 ranged geographically by provinces and districts, comprising an 

 atlas of forty topographic and geological maps, and a quarto volume 

 of about 300 pages, with maps and illustrations. 



Report B. — A volume on paleontology of the Cambrian, Ordovician, 

 and Carboniferous, prepared by specialists, and also a brochure on 

 zoology. 



Report C. — Studies in comparative geology of North America, 

 Asia, and Europe ; a discussion of continental histories and moun- 

 tain growth, to form a separate contribution and publication. 



Regarding the state of progress on Reports A and B, it is estimated 

 that both the volumes will be ready to submit for publication not later 

 than February i, 1906. The topographic maps for the atlas are 

 engraved and the geologic maps are being drawn. A box of speci- 

 mens containing some fossils and the principal collection of pre- 

 Cambrian rocks was lost in transit and was not recovered till May,. 

 1905. It was then shipped from Tientsin, but did not come to hand 

 till in November. The rocks are being studied by Mr. Blackwelder, 

 a matter of two months' work. The conclusions we had reached 

 may be modified by the additional evidence. Accordingly it is pro- 

 posed to complete the manuscript for the volume, but to hold it till 

 the additional specimens shall have been studied, so that the final 

 results ma}^ be incorporated. 



Report C was contemplated in the original purpose of the grant 

 of 1903, for studies in comparativ^e geology of North America and 

 Asia, and its scope was extended by the authority given in the sup- 

 plementary grant of 1904, to pursue parallel investigations in Europe. 

 The work done during Mr. Willis's stay abroad, from Februarj' to 

 June, inclusive, is accounted for below. As a principal result of the 

 journeys of the past two years, he is in possession of data relating 

 to the geology of Asia and Europe which may be discussed with 

 reference to similar facts of the geology of America. The broad 

 problems to which this discussion will be a contribution may be 



