The Editor requests that Contributors will bear in mind the 
POPULAR character of The Geologist, and endeavour to make 
their ai'ticles explicit and intelligible to general readers. 
Students or others wishing for information on particular points of 
Geology are requested to address their questions to the Editor of 
The Geologist. Answers will be given to them in an ensuing 
number of the Magazine. 
All communications and articles are deemed gratuitoua unless by 
special arrangement with the Editor. 
Contributors can have a limited number of re-prints of their 
articles for private distribution at a slight charge, by communicating 
their desire to the Editor on the transmission of their manuscripts. 
Letters and communications by Post, specimens, books for review, 
and parcels for this Magazine, to be addressed to the Editor of the 
Geologist, 22, Southampton-street, Strand, London, W.C., to whom 
all Advertisements may be addressed. 
Articles for publication in an ensuing number of the Magazine 
should be sent in before the 14th, and Advertisements by the 21st of 
the month. 
The Editor requests subscribers to forward their names and 
addresses direct to himself to insure correctness of delivery. 
The Geologist is sent by Post free to Subscribers for six months 
on receipt of a Post-Office order for 5s. 9d., or 6s. in Postage Stamps. 
Post-Office orders are to be made payable to Mr. Matthew Forster, 
at the Strand Post-Office. 
Geologist Office, S. J. MACKIE, 
22, Southampton-street, Strand. Editor and Proprietor. 
CORRESPONDENTS. 
Communications received from H. C. Salmon, Esq., F.G.S. ; J. W. 
Salter, Esq., F.G.S. ; Mr. H. "Ward ; J. Taylor, Esq., Levenshulme ; 
J. Mushen, Esq. ; J. G. Lee, Esq., Caerlem ; A. de S. M. ; N. T. 
WethereU, Esq., Highgate ; J. Reid, Esq. ; W. Colchester, Esq. 
BOOKS, ETC., RECEIVED. 
" Silliman's Journal." 
" Canadian Naturalist." 
" Liverpool Courier," &c. 
" Manchester Geological Society's Proceediugs." 
In the Press, price to Subscribers, 5s. 
THE CHALK CLIFFS OF DOVER. A Geological and Palaeontological 
Description of the Upper Cretaceous Strata. By S. J. Mackie, F.G.S., F.S.A. 
The above work will be illustrated by first-class woodcuts. Subscriptions 
will be received by the Author, 156, Strand. 
London : J. Van Voorst, Patembster-row. 
