EEYIEWS. 
417 
Atthey, on various species of Ctenodus, and also on tlie remains of reptiles 
and fishes from the shales of the Northumberland coal field, and a paper by 
Mr. G. S. Brady, on the Crustacean fauna of the salt marshes of Northum- 
berland and Durham. These are all lengthy memoirs, of great value as con- 
tributions to science. 
Geological Fragments. By John Bolton. London : Whittaker. 18G9. A 
not uninteresting sketch of rambles among the rocks of Furness and 
Cartmel, displaying careful observation of local geology devoid of any 
feature of originality, and containing a few very rough sketches of Actino- 
crinis. It is a sort of book never much read, and out of which publishers 
seldom realise fortunes. 
The True Theory of the Barth. By Research. Edinburgh: Bell and 
Bradfute. This work reminds us of a class whose authors delight so in 
quoting Scripture that we at once call to mind that elderly lady who re- 
ceived so much consolation from the constant repetition of the word Meso- 
potamia. It is a book utterly beyond our province. We can’t understand 
it, and if we did we couldn’t review it in these pages. 
A nev) Instantaneous wet Collodion Process. By Thomas Sutton, B.A. 
London : Green, 1869. The author, who was formerly lecturer at King’s 
College, describes a new process deserving the attention of photographers. 
The principle on which it depends consists in banishing free acid altogether 
from the process. The collodion used is neutral, the nitrate bath is neutral, 
and the sensitive film and the development are alkaline. 
Abolition of Patents. Longmans, 1869. This is a reprint of the principal 
speeches made during the past six months on this subject. 
Facts concerning the Sun is a reprint from the Riverside Magazine (Ameri- 
can) for August. Its illustrations are somewhat sensational, and relate to 
the August eclipse seen in America. 
r: K 2 
