160 



THE AMEEICAN MONTHLY [August, 1882. 



vill Manufacturing Co., 1883. (Pp. 248. 

 Price, $1.00.) 



Captain Abney is one of the most emi- 

 nent authorities on photography ; and he 

 has done much experimental work of 

 great scientific value. Thoroughly versed 

 in the chemistry of photography, and 

 practically familiar with the details of the 

 art, no one is more competent to write a 

 book on emulsion photography. 



The work before us is written for prac- 

 tical photographers, who, as a class, are 

 not chemists or scientific men. Hence the 

 author has endeavored to describe the 

 various processes of preparing emulsions 

 in language intelligible to all. We have 

 been surprised, in reading this book, to 

 find so little theory in it. Its great value 

 lies in the numerous recipes for emulsions 

 and developers, given so plainly, and with 

 such care that the merest tyro ought to 

 have no difficulty in preparing them. 



The processes of developing plates pre- 

 pared by different methods are given, and 

 the action of the various developing solu- 

 tions is explained. We cannot give a 

 lengthy notice of this book, since it is 

 hardly within our province ; but for all 

 who wish to learn something of the the- 

 ory of photography, as well as how to 

 prepare dry-plates, we know of no better 

 work. It is a useful book of reference for 

 those who are interested in photography 

 as amateurs, either in field-work or in 

 connection with the microscope. 



The Student's Manual of Histology for 

 the use of Students, Practitioners and 

 Microscopists. Second Edition. By 

 Chas. H. Stowell, M. D., Asssistant 

 Professor of Histology and Microscopy, 

 and the Instructor in the Histological 

 Laboratory of the University of Michi- 

 gan. Illustrated by one hundred and 

 ninety-two engravings. Detroit : Geo. 

 E. Davis, 1883. (Pp. 190. Price, $3.00.) 



The first edition of this book was pub- 

 lished last year, and was favorably no- 

 ticed in this Journal on page 180 of 

 Volume II. The new edition only differs 

 from the first, so far as we can perceive, 

 in having some typographical errors cor- 

 rected, and we can only reiterate our 

 opinions, more fully expressed last year, of 

 the practical value of the book to the 

 student of histology. The information 

 contained in it is concise, and carefully 

 selected to meet the wants of a large class 

 of students. We take pleasure in once 

 more commmending the work to our 

 readers. 



The Domain of Physiology or Nature in 

 Thought and Language. By T. Sterry 

 Hunt, LL.D., F. R. S. Presented to 

 the National Academy of Sciences and 

 read before it in Abstract, April, 1881. 

 Published in the London, Edinburgh 

 and Dublin Philosophical Magazine for 

 October, 1881, [V,] XII, 233—253. 

 Second and Revised Edition. Boston : 

 S. E. Cassino, 1883. (Pamphlet, pp. 28.) 



Exchanges. 



[Exchanges are inserted in this column without 

 charge. They will be strictly limited to mounted 

 objects, and material for mounting.] 



Wanted, material containing Pleurosigma angula- 

 tum, Nitzschia sigmoidia, Frustulia Saxonica and 

 Amphipleura pellucida. Mounted diatoms or material 

 in exchange. 



T. CHRISTIAN, 

 io8 Virginia, St., Richmond, Va. 



Rubber cement of my own manufacture, in ex- 

 change for good slides. 



EUGENE PINCKNEY, 



Dixon, 111. 



Well-mounted sections of Rat's tongue, Rabbit's 

 eye and Cat's muscle for other well-mounted objects. 

 F. B. CARTER, 

 519 Gates Ave., Brooklyn, N. Y. 



On receipt of a well-mounted slide, I will send a 

 slide of crystal, (for the polarizer) of any of the rare 

 vegetable products which I may have ; will send list 

 of same on receipt of postal request. 



J. KETCHUM, Jr., 

 P. O. Box 877, New York City. 



Wanted. — Animal parasites, Ixodes, Acari, etc., 

 either mounted or unmounted. W. A. HYSLOP, 

 22 Palmerston Place, Edinburg, Scotland. 



Unmounted objects, Foraminifera, Spicules, Plant- 

 hairs, Zoophytes, etc., in exchange for other objects, 

 mounted or unmounted. 



E. PINCKNEY, Dixon, 111. 



Wanted — First-class mounts of double-stained vege- 

 table preparations in exchange for first-class insect 

 preparations. H.S.WOOD MAN. 



P. O. Box 87, Brooklyn, E. D., N. Y. 



Wanted — First-class prepared and crude material, or 

 mounted objects, in exchange for diatoms in situ or 

 other first-class crude material, or for mounted objects. 

 M. A. BOOTH, Longmeadow, Mass. 



Wanted — Good gatherings of Diatoms, foEsilor re- 

 cent, especially of test forms. Liberal exchange in fine 

 slides ; prepared or rough material. Lists exchanged. 



C. L. PETICOLAS, 635 8th Street, Richmond,Va. 



Good, uncleaned Diatomaceous material containing 

 Arachnoidiscus^HeiipJ>e/ia,Pie7irosigina, Istkinia^ 

 Trice? atiimi, Suri7-ella gevuna and Tcr^sivcce 

 musica wanted, in exchange for well-mounted slides 

 of arranged diatoms, etc., or cash. 



DANIEL G. FORT, Oswego, N. Y. 



