292 REPORT — 1892. 



their operations bein? confined to the British islands. At the desire of 

 Professor W. Boyd-Dawkins, F.R.S., the information is now given, as it 

 may be of interest to many members of the Association. 



It has been suggested that, in order to save trouble in printing for 

 the purpose of supplying copies to applicants, donors of photographs, 

 should make arrangements with local photographers, to whom their nega- 

 tives may be entrusted, to execute orders for prints or lantern slides. 

 This information is added in one case in the present report, and will be 

 continued in future lists whenever a similar arrangement has been 

 effected. 



Your Committee have kept in view the question of the disposal of the 

 photographs and the proposed publication of a selection of approved sub- 

 jects, but recommendations on both these points are still deferred until 

 it is seen to what extent the collection is likely to reach. They respect- 

 fully request reappointment with the object of further proceeding with 

 the work, in order that the collection may not be too partial or incom- 

 plete, but may represent as nearly as possible all important geological 

 formations exhibited in the British Islands. Their special efforts, daring 

 next year, will, it is proposed, be directed to obtaining photographs from 

 the numerous localities not already included in the published lists. In this, 

 attempt, valuable assistance may be rendered by officers of the Geological 

 Survey and local geologists by sending to the Secretary of the Committee 

 early intimation of the opening of new sections showing features worthy 

 of record by photography, in addition to particulars of old sections of 

 typical importance, and localities of geological interest which havo 

 hitherto escaped record, or of which sketches and diagrams only have 

 been published. It is hoped, too, that delegates of the Corresponding 

 Societies and the officers of local Field Clubs or other bodies will bring the 

 scheme before their members, and thus materially aid in making known 

 the objects of the Committee. 



Certain instructions have been drawn up, in order to secure uniformity 

 of action, copies of which will be supplied on application to any member 

 of the Committee. It is understood, however, that these are to be con- 

 sidered merely as a guide, and that all suitable photographs illustrating 

 natural features of geological interest will be accepted for registration 

 even if not complying with the whole of the recommendations stated in 

 the circular, a copy of which is appended : — 



Instructions for the Collection of Geological I'hotograplis. 



Photographs are desired illustrative of characteristic rock exposures, especially 

 those of a typical character or temporary nature; important boulders; localities 

 affected by denudation, or where marked physiographical changes are in operation ; 

 raised beaches ; old sea-clitTs and other conspicuous instances of marine erosion ; 

 characteristic river-valleys or escarpments, and the like ; glacial plienomena, such as 

 rooJies moutonw'es, moraines, drums and kames, or any natural views of geological 

 interest. Photographs of microscopical sections and tyi^ical hand-specimens of rocks ■ 

 are also admissible. 



I. The views should be taken under skilled geological direction, and the most 

 typical views should be sectired in preference to general views. Societies are urged 

 to form committees for the purpose of noting sections suitable to be photographed, 

 and arranging such work as may be possible in each district. To this end it is 

 anticipated that the services of many amateur photographers may be usefully brought 

 into requisition. 



II. Size of 'phoiogn\^'\ recommended: 8i by G\ inches (' whole plate ') ; but this 

 is optional. In view of the difficulty of carrying a heavy camera and plates, it is not 



