72 THE AMERICAN MONTHLY [March, 



scarlet fungus ; Mr. Carpenter, fine specimens of coral ; Mr. G. Lav- 

 ender and Mr. T. E. Bolton, living specimens of pond-life; Mr. 

 W. H. Wilkinson, lichens from Noi'way, birds and plants from Wales. 



NOTICES OF BOOKS. 



The Post- Graduate Clinical Charts. By Wm, C. Bailey, M. D. 

 and J. H. Linsley, M. D. New' York, 1891. 

 These elaborate charts were originally prepared for use in the Post- 

 Graduate Hospital. Each book holds the record of one case for eight 

 weeks. They seem admirably adapted for hospital use and for those 

 cases of which it is desired to keep an exhaustive record. For the 

 busy practitioner they seem to us too bulky. In the chart for disease 

 of the lungs there is a column for recording the number of injections of 

 " tuberculin," and the number of milligrammes injected. Few phy- 

 sicians will find use for this column at present. 



SUBSCRIBERS' NOTICES. 



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



WANTED.— Vol. VII, No. 2 (Feb., 1886), of American Monthly Microscopical Journal. 



A. G. YOUNG, State House, Augusta, Me. 



WANTED. — Diatom material from America, Australia, and Asia in exchange for fossil and recent 

 material from Denmark. 



CHR. MICHELSEN, 33 Nedergade, Odense, Denmark. 



FOR EXCHANGE. — Slides of diatoms from peat bogs in Boston, Mass. 



F. F. FORBES, Brookline, Mass. 



WANTED. — Vol. I, American Monthly Microscopical Journal. 



C. K. WELLS, Marietta, Ohio. 



WANTED TO PURCHASE. — Histological slides from normal tissues of mammals, prepared with 

 a view to show the size of the " cells," in cases where the age of the animal-subject is definitely known, 

 as bearing on the question of a supposed diminution in the size of cells in aging organisms, correspond- 

 ing to a similar decrease, reported by Balbiani and Maupas in aged unicellular life. Address, 



C. A. STEPHENS' LABORATORY, Norway Lake, Maine. 



WANTED. — Diatomaceous material of good quality, fossil and recent. I offer diatom slides or 

 photo-micrographs in exchange. 



^ D. B. WARD, Poughkeepsie, N. Y. 



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



PROF. ORSON HOWARD, Salt Lake City, Utah. 



CORRESPONDENCE invited with a view to the e.xchange 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. 



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. 



FOR SALE OR EXCHANGE.— Mosquitoes, male and female. Price 75 cents each. Will ex- 

 change only for first-class mounts. E. W. SHARP, 2800 Richmond St., Philadelphia, Pa. 



A $s MICROSCOPE. — Made on proper scientific principles. Magnifies 100 diameters or 10,000 

 times. For other interesting articles send for list of Popular Scientific Specialties. 



G. S. WOOLMAN, 116 Fulton St., New York. 



SPECIAL BARGAIN in histological slides. 



WM. N. BEGGS, M. D., 2207 Sidney St., St. Louis, Mo. 



FOR SALE OR EXCHANGE.— Photo-micrographs of P. angulaturo. taken through Spencer's 

 ^"ij H. I., 2400 diameters. Also photo-micrographs of bacteria, diatoms, etc., 25 cents each. Will ex- 

 hange for well-mounted slides. Dr. J. E. BAKER, Wyoming, Ohio. 



