THE MICROSCOPICAI, ADVERTISER. 



LIVING OBJECTS 

 FOR THE MICROSCOPE. 



A vial rich in beautiful and 

 interesting forms will be mailed 

 for fifty cents. Usually 20 to 

 40 genera are associated togeth- 

 er as below, the kind varying 

 with the season. 



Anguillulay Tardigrada, 

 AiTKBba, Arcella, Difflugia, Coch- 

 liopodium, Euglena, Astasia, Sy- 

 7iura, Pandorina^ TracJielomonas 

 Anisonema, Spirostomum, Sten- 

 tor, Vorticella, Nassula, Pleuro- 

 ne?na, etc., besides several i2o/e- 

 fei's, Diato7ns, Desmids. 



Also, either of the following 

 can be supplied at same price: 

 Hydra, Plumatella, Melicerta, 

 Floscularia, Stephanoceros, Vol 

 vox glohator, when procurable. 



JAMES H. LOGAN, 



303 Federal St., 

 Allegheny, Pa. 



Boston Optical Works, 



CHARLES X. DALTON. 

 Successor to the latp R. 3. lolles, 



MANUKACTUUKK OF 



Microscopes, Tdc^copcs ami Accessories, 



30 and 4>i Manover Street. Bostou. 

 TOLLES' CELIBRATED ACHROMATIC TRIP- 

 LETS N ML-ER CASE.S. 

 A List of TuLLES' Objectives ulwiiyB ou hand. 



NEW DIATOM SLIDES.— Montgomery, Ala. 

 1) : New Art( siau Well, Atlantic City (2) ; Sendia, 

 lapau, (2) ; Qninuipiac, Conn.; Texas fresb-water 

 losfil ; Hudson River (fi) ; Sag Harbor (2) ; Brigantine, 

 N. J.; Marsh, near Mobile : Odense, Denmark ; Qom- 

 phonema H>-rculeannm, 40 cents each. $4.00 per 

 dozen. Single named species from 40 cents up. 

 Type plates, ."iO species, $3.00. 100 species, $().000. 



Catalogues on application. Photo-micrographu 

 made on reasonable terms. All work furnished 

 promptly. 



D. B. WABD. M. D., 

 Foughkeepsie, N. Y. 



There is nothing more soothing to overtaxed 

 nerves than to watch the quiet life in an aqua- 

 rium. "THE AQUARIUM," a quarterly mag- 

 azine, contains information thereon. Sample 

 free, Hugo Mullert, 173 Nostrand Ave., Brook, 

 lyn, NY. 



THE MICROSCOPE.. 



Contents for November, 1894. 



Objects Seen Under the Microscope. Sand Grains and What We May 



Learn From Them, by William Mackie. (Illustrated) 159 



Another Note on Mr. Cunningham's Paper on the Animality of the 



Diatom, by Arthur M. Edwards, M. D 169 



Editorial. — Made an Assignment 170 



Personal . 1~0 



Pure Food 170 



Questions Answered.— Nos 206-209, by Dr. S. G. Shanks 171 



206. To Breed Eels in Paste 171 



207. Illustrations of Bacteria 171 



208. Prepared Stain for Tubercle Bacilli 171 



209. Immunity, or Cures Produced by Injections of Something 171 

 Practical Suggestions. — By L. A. Willson 172 



Fresh Mounts 172 



How to Obtain Foramenifera From Chalk 172 



Preservation of Algse 172 



Fixing Objects to a Slide 172 



Crystal Slides 173 



Science-Gossip. — A Compleet Set 173 



Fermentation 173 



Fruit Skins 173 



Microscopical Praxis 173 



