430 -REvORT—1890. 
[CrrcuLAR No. 
{Reduced Copy of Form A,] 
Form A. No. of Photo.* 
BRITISH ASSOCIATION COMMITTEE ON GEOLOGICAL PHOTOGRAPHS. 
Photographed under the direction of 
County of 
Society, 
Name and position of 
Locality or Section. 
Special features shown. 
Height Compass Direction, |‘Inshade’ or ‘ direct light.’ 
Details of Section, 
am. p.m. 
Length Time: 
Sketch, or other particulars, if necessary, may be given here :— 
Name of Photographer Registered No. 
Address Date photographed 
* This Number should also be placed on the back of the Photograph. 
Instructions for the Collection of Geological Photographs. 
Photographs are desired illustrative of characteristic rock-sections, especially 
those of a typical character or temporary nature; railway cuttings; important 
boulders ; localities affected by denudation or where physiographical changes are in 
operation ; raised beaches ; old sea-clifis; coast scenery and coast erosion; charac- 
teristic river-valleys, escarpments, and other landscape features; glacial phenomena 
such as roches moutonnées, moraines, drums, and kames, and natural views of geological 
interest. 
I.—The views should be taken under skilled geological direction, and in every case 
the most typical views should be secured in preference to general views. It 
may be convenient for Societies to form a small committee for the purpose of 
noting suitable sections desirable 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. 
Il—Size of photograph recommended : 8} by 6} inches (‘whole plate’). (In view 
of the difficulty of carrying a heavy camera and plates it is not desired to 
exclude smaller views when these are well defined and clear. The size, there- 
fore, is optional.) 
The views should be printed by a permanent process whenever practicable. 
IIJ.—It is necessary, in order to preserve its scientific value, that each photograph 
should be accompanied by the following details, which may be given on forms 
supplied as per copy, and attached loosely to the photograph (not fastened on 
the back) :— 
(a) Name and position of section or locality. 
(b) Special feature shown, with illustrative diagrams, when necessary. 
(Details may be given, if more convenient, on a separate tracing 
attached to the photograph.) 
(c) Height and length of section, and compass direction. 
