50 
J. HOPXINSON—ON GEOLOGICAL 
Our Society has since received from Mr. Jeffs a circular ashing 
for aid and co-operation in furthering the work of the Committee 
by supplying him, through its Delegate, with the following infor¬ 
mation :— 
(1) Lists and details of photographs taken, illustrating localities and sections. 
(2) Names of local societies, or persons, who may he willing to further the 
objects of the Committee in their own district. 
(3) Particulars of new localities, sections, boulders, or other features which 
it may he desirable to have photographed. 
The circular further states : “ The Committee will also he glad 
to receive a copy of the print from each negative, which will be 
exhibited at the succeeding meeting of the Association, and after¬ 
wards preserved for reference. It is thus hoped to form, eventually, 
a National Collection of Photographic Views illustrating the Geo¬ 
logy of our Country, and deposited in a centre where the collection 
will be available for purposes of study and comparison. Photo¬ 
graphs officially received will be numbered and registered, and a 
detailed list will be published in the Report of the Committee, 
showing where the photographs may be obtained.” 
The Committee has also issued the following 
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 [greatly] affected by denudation, or where physiographical 
changes are in operation ; raised beaches ; old sea-cliffs ; coast-scenery and coast- 
erosion ; characteristic river-valleys, escarpments, and other landscape features ; 
glacial phenomena, such as roches moutonnees , 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. 
II. —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 he printed by a permanent process whenever 
practicable. 
III. —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 [reduced] copy on next page, 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. [The true {i.e. 
not the magnetic) direction should be given.] 
(d) Name of photographer, and society under whose direction the view is 
taken. 
(e) Date when photographed. 
(/) Indication of direction of light and shade ; i.e. state whether taken in 
“ direct light ” or “in shade.” 
