, REPORT OF THE PHOTOGRAPH COMMITTEE 465 



The Auditing Committee reported that the Treasurer's accounts had 

 been found to be correct, and the Society adopted the report. 



The Committee on Photographs submitted the following report, read 

 by the Secretary : 



ELEVENTH ANNUAL REPORT OP THE COMMITTEE ON PHOTOGRAPHS 



During the past year the collection of photographs belonging to the 

 Geological Society of America has been increased by 120 views contrib- 

 uted by the Director of the United States Geological Survey. They are 

 described in the list below. These prints have not yet been delivered, 

 but they will soon be ready. Most of them are to be mounted on muslin 

 for economy in bulk. No offers of prints have been received from other 

 members of the Society. 



The collection now numbers 2,033 photographs, which are carefully 

 stored in the Geological Survey building and easily accessible. It con- 

 tains a large amount of valuable material, and every year a moderate 

 number of copies are ordered for illustrations for text-books and various 

 other educational purposes. It is to be regretted that more extensive 

 use is not made of the collection. 



Members of the Society are requested to make additional contribu- 

 tion, but it should be carefully selected so as to include only views which 

 clearly illustrate geologic features or phenomena of general interest, for 

 the collection now contains 15 or 20 per cent of niaterial which the com- 

 mittee does not regard as of general interest or likely to be useful for 

 geological illustrations. The collection would be greatly benefited by 

 the elimination of such views. 



The suggestion is offered that during the coming year a complete list 

 of the photographs be published as a brochure of the Bulletin. It would 

 be a reproduction of the lists which have been included in the Proceed- 

 ings for the last ten years, but it is believed that such a publication, 

 with classified subject index, would greatly increase the usefulness of 

 the collection. 



Respectfully submitted. N. H. Darton, 



Committee. 



REGISTER OF PHOTOGRAPHS RECEIVED IN 1900 



Presented by the United Slates Geological Survey 



Seven 6h x 82^ photographs, by C. D. Walcott 



(657). Lower Paleozoic section in cliffs, north side of canyon, north fork of 

 Dearborn river, Lewis and Clarke county, Montana. 



((-i59). Carboniferous limestone cliff of mount Dearborn, north fork of Dear- 

 born river, Lewis and Clarke county, Montana. 



