78 THE AMERICAN MONTHLY. [April. 



think I am justified by experience and study in saying, what has been well said before, 

 that whatever can be seen with an objective and eye-piece can be photographed as 

 clearly as it can be seen, provided proper methods of preparation for photography are 

 followed. I think it may be further stated that such methods of preparation will not 

 diminish their value under the tube. Go through a cabinet of ordinary mounts and 

 see how few are photographable I The enormity of the thing appears when we consider 

 that nearly all classes of mounts, including opaque, may be readily photographed if 

 properly prepared. To this, however, there are a few exceptions. The additions to 

 general knowledge of matters microscopic which could be made, if all working micro- 

 scopists would prepare with reference to photography, is simply enormous. 

 Rochester, N. Y., March ib, /888. GeO. W. RafTER. 



NOTICES OF BOOKS. 



Jon7-nal of Morphology, Vol. I, 2. 



The last half of the first volume of this new journal has made its appearance, and is in 

 every way equal to the expectation created by the first volume. It contains five articles, as 

 follows: — (i) Phenomenaof the egg during maturation and fecundation, by C. O. Whit- 

 man ; (2) Embryology of Petromyzon, by W. B. Scott ; (3) Embryology of the Lizard, 

 by Henry Orr ; (4) FcEtal membranes of the Marsupials, by Henry F. Osborn, of Prince- 

 ton ; (5) Observations on the mental power of Spiders, by Geo. W. and Eliz. G. Peckham. 

 It would be a pleasure to abstract these articles, but that we are not permitted by our 

 space to do. We hope to do as much for at least some of the articles on a future occa- 

 sion. We feel a pride in thinking that it is an American production, and in realizing 

 how very favorably it compares with similar magazines of foreign countries. It should 

 find a place in every college library. It is not only a necessity to advanced students 

 of biology, but it shows general readers what animal morphology is and how students 

 think and work. 



Exchanges. 



[Exchanges are inserted in this column without charge. They will be strictly limited to mounted objects, an 

 material for mounting.] 



WANTED. — Parasites and books on Parasites and other micro, subjects. Will give Anatomical, Pathologil 

 cal, Botanical, Micro-fungi, Zoophytes, Polycistinae, Foraminifera, Parasites, and other slides in return. 



FRED. LEE CARTER, Gosforth, near Newcastle-on-Tyne, England. 

 Wanted, Diatomaceous earth from Megillanes, Bolivia, South America. Can give in exchange either Dia- 

 tomaceous earth from New Zealand or cash. E. MICHALEK, 



I. Fleischemarkt, No. i, Vienna, Austria. 

 Mounted sections of Foetal Lung (5 months), sections across entire lobe, ^(^ in. thick, beautifully stained, in 

 exchange for first-class pathological slides. W. C. BORDEN, M. D., U. S. A., 



Fort Douglas, Utah. 

 Correspondence relative to exchange in microscopical material or prepared mounts. 



HENRY L. OSBORN, Hamliue, Minn. 

 Wanted, earths, recent diatoms, and miscellaneous objects for mounting. Only first-class material offered or 

 desired. MARY A. BOOTH, Longmeadow, Mass. 



Fossil Diatomaceous deposits (marine) wanted from Bermuda, Virginia, Maryland, California, etc. 



L ELLIOTT, Ardwyn Villa, Aberystwith, Wales, England. 

 Labels for slides. EUGENE PINCKNEY, Dixon, 111. 



Notices. — All communications for publication should be addressed to Henry Leslie Osborn, Hamline 

 University, Hamline, Minn." 



Subscriptions, and all matters of business, should be addressed to the Manager, Chas. W. Smiley, P. O. 

 Box 630, Washington, D. C. 



Subscription price $1.00 PER YEAR strictly in advance. All subscriptions should end with the De- 

 cember number. A pink wrapper indicates that the subscription has expired. A date on the wrapper in- 

 dicates the month to which payment has been made. 



Orders for slides advertised by A. J. Doherty in the Journals from January to April, 1887, may be sent 

 through the Business Alanager, P. O. Box 630, Washington, D. C, 



A few copies of Leidy's Fresh-Water Rhizopods, of North America, can still be had at $5 00 per copy. — P. 

 O. Bo.x 630, Washington, D. C. 



Remittances should be made by postal notes, money orders, or by money sent in registered letters. Drafts 

 should be made payable in Washington, New York, Boston, or Philadelphia, to the order of the Manager. 



The first volume, 1880, is entirely out of print. The succeeding volumes will be sent by the publisher for 

 the following prices which are net: — Vol. II (1881) complete, $1.50; Vol. Ill (1882), out of print; Vol. IV 

 (1883) complete, ^1.50; Vol. V (1884) complete, #1.50 ; Vol. V (1884), Nos. 2-12, gi. 00 ; Vol. VI (1885), gi.50 ; 

 Vol. VII (1886), $r.oo; Vol. VIII (1887), $1.00. As calls for Volume I sometimes occur, those persons having 

 copies to dispose of would do well to inform us, and to state their prices. 



