ON PHOTOGRAPHS OF GEOLOGICAL INTEREST. 381 
The duplicate collection has been sent, entire or in part, to the follow- 
ing local societies :—The Manchester Geological Society ; the Hertford- 
shire Natural History Society ; The Essex Field Club ; the Scientific 
Society of the Birmingham and Midland Institute; the Vesey Club, 
Sutton Coldfield ; the Croydon Microscopical Society ; and the South- 
Eastern Union of Natural History Societies. 
The additions to this collection during the year are given in List TV. 
61 prints and 6 slides have been received, and the whole collec- 
tion now numbers 324 prints and 101 slides. A list of donors to this 
collection is appended to List IV., and to each of them the Committee 
express their thanks. 
It has been found desirable to admit to this collection photographs 
illustrative of such geological phenomena as do not occur in England, or 
are more typically represented abroad. Thus Mr. Coomara Swamy has 
contributed a set of photographs of volcanic phenomena from the 
Auvergne and the Eifel ; Professor Hutton one of earth-pyramids in New 
Zealand ; while the collection already contained photographs of earth- 
pyramids from Botzen, and one of the false bedding in the face of the 
Sphinx. 
Applications by local societies for the loan of this collection should 
be made to the Secretary. Hither prints or slides, or both, can be lent, 
with a descriptive account of the slides. The carriage, and the making 
good of any damage to slides or prints, are borne by the borrowing society. 
TENTH LIST OF GEOLOGICAL PHOTOGRAPHS 
(ro Juty 30, 1899). 
Novu.—tThis list contains the geological photographs which have 
been received by the Secretary of the Committee since the publication 
of the last Report. Photographers are asked to aflix the registered 
numbers, as given below, to their negatives for convenience of future 
reference. Their own numbers are added, in the same order, to enable 
“them to do so. are 
Copies of photographs desired can, in most instances, be obtained 
from the photographer direct, or from the officers of the Local Society 
under whose auspices the views were taken. 
The price at which copies may be obtained depends on the size of the 
print and on local circumstances over which the Committee have no control. 
The Committee do not assume the copyright of any photographs 
included in this list. Inquiries respecting photographs, and applications 
for permission to reproduce them, should be addressed to the photographers 
direct, 
The very best photographs Jose half their utility, and all their value 
as documentary evidence, unless accurately described ; and the Secretary 
would be grateful if, whenever possible, such explanatory details as can 
be given were written on the forms supplied for the purpose, and not on 
the back of the photograph or elsewhere. Much labour and error of tran- 
scription would thereby be saved. A local number ‘by which the print 
"ean be recognised should be written on the back of the photograph and on 
the top right-hand corner of the form. 
Copies of photographs should be sent wwmownted to W. W. Watts, 
