i 9 2 THE MICROSCOPE. 



EXCHANGES. 



(Exchanges are inserted on this page without charge. Subscribers having 

 microscopic apparatus for sale or exchange can announce the same without 

 charge.) 



A HOMOGENEOUS immersion (works also dry, water or glycerin) 1-15, 

 180 adjustable, to exchange for a higher power. A. Y. MOORE, 57 

 Prospect St., Cleveland, Ohio. 



FOR SALE OR EXCHANGE for objectives or accessories, one copy Car- 

 penter's "The Microscope and its Revelations," also Dana's "Manual 

 of Geology." Both books are new and latest editions. Cost $10.50. H. F. 

 WEGENER, Denver, Colorado. 



NA. RICHARDS, of St. Louis, Mich., has for exchange a few mounts 

 . of double-stained and single-stained vegetables; also a number of well- 

 mounted injected specimens. 



EXCHANGE. — Untreated diatoms and miscellaneous material in large 

 variety to exchange for good prepared material for mounting of any kind. 

 M. A. BOOTH, Longmeadow, Mass. 



FOR SALE. — One Tolles' 4-10 objective of 100° adjustable; also one lyi. 

 inch objective of 23 by William Wales. Both made to order and first- 

 class^ 



WILL EXCHANGE. — One copy of Leidy's Rhizopods of North America, 

 for objectives or accessories. Address, C. H. STOWELL, Ann Arbor, 

 Mich. 



FOR SALE. — Two Oxy-Hydr. Projecting Microscopes — cheap. I. G. 

 LANGGUTH, 133-135 Wabash Avenue, Chicago. 



FOR SALE. — A Spencer % 115 or will exchange for a wide angle %. 

 F. O. Jacobs, Newark, O. 



1WILL exchange good, histological for other first class mounts. S. G 

 SHANKS, M. P., 547 Clinton Avenue, Albany, N. Y. ___ 



ILL exchange rubber cement for good slides. EUGENE PINCKNEY, 

 Dixon, 111. 



w 



ACARI INSECTS, Spermatozoa of Horse, Pathological and other well 

 mounted slides in exchange for Pleurosigma, Trichina, Diatoms, Stained 

 Bacteria, &c, &c. J. O. STILLSON, 504 Upper 2d St., Evansville, Indiana. 



FOR SALE. — Mounts of renal tube casts and double-stained blood cor- 

 puscles. $1.00 per slide. A. Y. MOORE, 53 Prospect St., Cleveland, 

 Ohio. 



H 



AVE a large number of histological mounts for exchange. T. B. 

 STOWELL, Ph. D., Cortland, N. Y. 



WANTED. 



To know why "Grey Beard" did not stop. 



A specific for diatomonomania. 



To see a worse section-cutter than Seiler's. 



To know how to sharpen the knife for section cutting; 



And how to keep the edge from getting rough. 



To keep oil of cloves away from the tongue. 



Fifty more names for our page of "Exchanges." 



