240 THE AMEEICAN MONTHLY. [October, 



138 pages and is full of interesting material, which adds greatly to the 

 usefulness of the volume. 



A feature to be highly commended is the vocabulary, which covers 

 over a hundred pages and contains numerous illustrations. 



It needs only to be added that mechanically this book follows the plan 

 of Allen & Greenough's Latin Classics, being both neat and durable. 

 Practical Latin Composition. By Wm. C. Collar, A. M. 12 , 

 268 pp. Ginn & Co., Boston. Price, $1.10. 



This is a new departure in Latin composition. It contains fifty pages 

 of extracts from Nepos, Caesar, and Cicero, which the student is sup- 

 posed to make himself thorough with before attempting Latin composi- 

 tion. By means of a series of annotated exercises he reproduces the 

 story, but in slightly varied Latin sentences, which successively illus- 

 trate the various grammatical constructions. The Latin text is so 

 closely reproduced that no English-Latin vocabulary is necessaiy. I 

 should think that the new method would be very successful. 

 Microscope Catalogue. By Bausch & Lomb Optical Co., Rochester. 

 8°, pp. 112. 



This is their twelfth and best edition. Among the new features are 

 a new biological microscope, the biological objectives which have been 

 constructed for the short tube, and intended principally for histological 

 work, and various new accessories, such as condenser, mounts, etc. 



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 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 

 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-trified 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. 



OFFERED. — Zeiss' New Catalogue (in German) forwarded lor 10 cents in stamps. 



F. J. EMMERICH & SONS, 43 Barclay St., New York City. 



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



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



WANTED. — (In exchange for slides.) "Microscopical Bulletin," Vol. I. No. 5, August, 1884. 



M. S. W1ARD, 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 Hogas Microscope. 



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



WANTED. — A clean copy of Wolle's Fresh- Water Algae 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. 



