THE MICROSCOPICAL 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. 



Anguillula, Tai'digrada, 

 Atnceha, Arcella, Difflugia, Coch- 

 liopodmm, Euglena, Astasia, Sy- 

 nura, Pandorina, Trachelomonas 

 Anisonema, jSpii'ostomum, Sten- 

 tor, Vorticella, Nassula, Pleuro- 

 nema, etc., besides several Roti- 

 fers, Diatoins, 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 0|)tlcal Works, 



CHARLES X. DALTON, 

 Successor to the fate R. B. Tolles, 



MANUFACTUUKR OP 



Microscopes, Telescopes, aod Accessories, 



30 and 48 Hanover Street, Boston. 



TOLLES' CELEBRATED ACHROMATIC TRIP- 

 LETS IN SILVER CASES. 



A List of TOLLES' Objectives always on band. 



NEW DIATOM SLIDES.— Montgomery, Ala. 

 1 2) ; New Artosian Well, Atlantic City (2) ; Sendia, 

 Japan, (2); Quinnipiac, Conn.; Texas fresh-water 

 fosHil ; Hudson River (6) ; Sag Harbor (2) ; Brjgantine, 

 N. J.; Marsh, near Mobile : Odenae, Denmark ; Gom- 

 phonema Hi-rculeanum, 40 cents each. $4.00 per 

 dozen. Single named species from 40 cents up. 

 Type plates, 50 species, $3.00. 100 species, $6,000. 



Catalogues on application. Photo-micrograph» 

 made on reasonable terms. All work furnished 

 promptly. 



D. B. -WABD. M. D., 

 Fouehkeepsie, N. T. 



Theke is nothing mobe 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. 

 Ijm, N.Y. 



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 170 



Pure Food , 170 



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



206. To Breed Eels in Paste 171 



207. Illustrations ot 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 



Hovrto Obtain Foramenifera From Chalk 172 



Preservation of Alg£e 172 



Fixing Objects to a Slide ; 172 



Crystal Slides 173 



Science-Gossip. — A Compleet Set 173 



Fermentation 173 



Fruit Skins 173 



Microscopical Praxis 173 



