282 THE AMERICAN MONTHLY. [December. 



ations by which they are introduced, may easily become familiar. On 

 the other hand, the usual technical terms are added [in square brackets] 

 for glossarial purposes, for the assistance of classical scholars, or for the 

 use of such other students as may feel the need of them, or be advised 

 by their teachers to employ them. 



o 



The National Magazine is a new publication devoted to corres- 

 pondence teaching and University extension, and is the organ of the 

 new National University of Chicago. The first number contains arti- 

 cles entitled " Correspondence Teaching ; Its Advantages," by Rev. J. 

 C. Quinn, A. M., Ph. D. ; " Hints on Collecting and Preserving 

 Specimens of Natural History," by Prof. G. H. French, A. M. ; 

 " Lectures on English Literature," " The Reading Circle," and the 

 Announcement of the University, giving a list of thirty-five non-resi- 

 dent, professors representing, among others, such institutions as the 

 University of Virginia, Tulane, Boston, Madison and Lehigh Univer- 

 sities, who agree to teach pupils at home by correspondence and grant 

 them the usual degrees on examination. 



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 material, also m'crographic 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 

 Diatomaceae. 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. 



TO EXCHANGE. — -Native gold, silver, copper, lead, zinc, and other beautiful cabinet specimens, 

 polished ornaments and sections of p: trifled wood — Chalcedony — and native turquoise, agate, amethyst; 

 rubies, etc.; also Indian ornaments, curios, arrows, blankets, pottery, etc.; pelts of wild animals, species 

 of native cactus, and a good second-hand "Burt's Solar Compass" complete. Any or all of the above 

 are offered in exchange for new, or good second-hand, objectives, condensers, polarizers, stand, or other 

 microscopical apparatus. W. N. SHERMAN, M. D., Kingman, Arizona. 



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



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



WANTED. — (In excnange for slides.) " Microscopical Bulletin," Vol. I. No. s, August, 1884. 



M. S. WIARD, New Britain, Conn. 



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. 



WANTED. — A clean copy of Wolle's Fresh- Water Algse 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 x l s homogeneous-immersion objective, for ^ glycerine or 

 water objective. 



J. M. ADAMS, Watertown, N. Y. 



