ON PHOTOGRAPHS OF GEOLOGICAL INTEREST. 407 



>vith a ;^-plate or five by four camera, and subsequent enlargement on 

 bromide paper. In this case it is essential that the lens should be of first- 

 rate make. For direct printing, the cold-bath platinotype method is 

 recommended as the most permanent ; it is now very ea.sy to work. 



It is advisable, when measurements are unattainable, that a ' scale 

 object' should be included in the photograph. (A hammer is sometimes 

 used, but it is not suitable.) 



Arthur S. Reid, ") /-d c • i. j 



4 r. (Keierees appointed 



AXIBREY bXRAHAN, I ^ , ,, /-, ^^ •, . 



J. J. H. Teall, r ^y ^^? Committee 

 William Gray. J to makethe^jr.c...) 



The Council of the Association having approved of the recommendation 

 to deposit the collection of photographs at the Museum of Practical 

 Geology, Jermyn Street, London,' the work of arranging the photographs 

 preparatory to their reception at the Museum was commenced. It was 

 expected that the collection would be deposited in its permanent home 

 early in the present year ; but the work of mounting and arranging was 

 unavoidably delayed, and when this could be i^roceeded with, the Secretary 

 found himself unable, through unexpected calls upon his time, to undertake 

 the necessary supervision and to complete the work at the date originally 

 intended. These unforeseen difficulties have now, however, been over- 

 come, and the first portion of the collection, consisting of five portfolios 

 and fourteen cases, containing some 886 photographs (as given in the 

 Schedule, Appendix I.), has now been delivered at Jermyn Street. The 

 remainder will be completed and forwarded to the Museum as soon as 

 possible after the conclusion of the meeting at Ipswich. 



The Committee desire to record their deep sense of the loss sustained 

 through the death of their esteemed colleague. Professor Valentine Ball, 

 C.B., F.R.S., whose active and valuable assistance in furthering the 

 objects of the Committee was most highly appreciated. 



Now that the collection of geological photographs has found a 

 permanent home, where, in due time, it will be accessible to the public, 

 the Committee are desirous of pushing their work forward as rapidly as 

 possible. There is still, however, much to be done before the collection 

 can be said to be truly representative, in a pictorial sense, of the leading 

 outlines of British geology. Important sections are being frequently 

 opened, of which it is often useful to preserve photographic record, and the 

 large area from which no photographs have yet been sent in points to the 

 desirability of the continuance of systematic effort to obtain a more 

 complete series of geological illustrations. 



It is, moreover, felt that the value and utility of the collection would 

 be greatly increased by the publication of a supplementary catalogue 

 having a geological arrangement. Should the Committee be reappointed 

 for another year, it is not desired to apply this year for a renewal of the 

 grant. 



SIXTH LIST OF GEOLOGICAL PHOTOGRAPHS. 



(to august 1895.) 



Note. — This list contains the subjects of geological photographs, 

 copies of which have been received by the Seci'etary of the Committee 



' See last year's Report. 



