96 THE AMERICAN MONTHLY [April. 



terial life, in which we are in a measure admitted behind the scenes ; 

 but some may feel inclined to doubt the reality of the amazing sights 

 we are made to see. However this may be, the book is written in an 

 entertaining style ; and the author displays no little ability in picturing 

 his transitions from the heights of bliss to the depths of woe. Consid- 

 erable theological discussion is interjected into the volume the force of 

 which is to justify his abandonment of the fundamentals of Christianity, 

 Any out who wants to reopen these questions will be much inter- 

 ested in that part of the volume, and should also read " God and Man," 

 by the same author. 



o 



Griffith's Slide Pocket-Book. — In the accompanying figure is 

 shown a very simple and neat contrivance for carrying slides from place 



to place. It is designed by Mr. 

 E. H. Griffith, of Fairport, N. 

 Y., who is well known to the 

 microscopic world by his ex- 

 cellent devices and microscopic 

 improvements. This cabinet is 

 fitted up to hold six objects, each 

 of which is separated from the other bv a wooden partition. When 

 closed the box resembles a very neat black cloth-covered pocket-book, 

 hence the name. 



SUBSCRIBERS' NOTICES. 



[These notices will be given six insertions in this column at 25 cents per line or fraction thereof. 

 FOR EXCHANGE.— Slides of selected diatoms. D. B. WARD, Poughkeepsie, N. Y. 



WANTED. — Unmounted microscopical piaterial, also micrographic dictionary. Will exchange or 

 buy. CHARLES VON EIFF, 124 Clinton Place, New York City. 



WANTED. — A clean copy of Rev. William Smith's British Diatoms, and Schmidt's Atlas of the 

 Diatomacese. JAMES B SHEARER, Bay City, Mich. 



OFFERED.— Diatomaceous Earth from Utah (Desert) for Histological Mounts. 



PROF. ORSON HOWARD, Salt Lake City, Utah. 



CORRESPONDENCE invited with a view to the exchange of either mounted or unmounted Oribatida 

 (British) for American species. E. BOSTOCK, Stone, Staffordshire. 



WANTED. — Any works on Microscopy not already in my Library. 



H. M. WHELPLEY, F. R. M. S., St. Louis, Mo. 



Labels in exchange for slides. ~ EUGENE PINCKNEY, Dixon, 111. 



First-class Histological Slides for other good mounts ; Histological and Pathological material cut on 

 shares. S. G. SHANKS, M. D., 547 Clinton Ave., Albany, N. Y. 



OFFERED. — Griffith & Henfry Micrographic Dictionary to be sold ; also Hoggs Microscope. 



J. P. WINTINGHAM, 36 Pine St., N. Y. 



WAN PED. — A clean copy of Wolle's Fresh-Water Algffi of the United States (2 vols.) ; also good 

 second-hand Grunow Camera-Lucida, and a self-centering Turn-table. 



JOS. P. THOMPSON, P. O. Box 1383, Portland, Me. 



FOR SALE CHEAP. — New Gundlach -jg homogeneous-immersion objective, for 55 glycerine or 

 water objective. J. M. ADAMS, Water'town, N. Y. 



FOR SALE. — A Bausch & Lomb Stand, A. & C. eyepieces, i in. and ^ in. objectives. 



BOX I. Evanston, 111. 



FOR EXCH.ANGE. — Cabinets of lower silurian fossils for microscopical apparatus or objects. 

 Correspondence invited. E. L. SHERWOOD, Houston, Miss. 



OFFERED. — $400 in prizes. For details see article in January number of this journal for i8go. 



C. A. STEPHENS, Noi^vay Lake, Me. 



