SCIENCE.— AD VEB TISEMENTS. 



New Catalogues. 



I issue new catalogues of Scientific Apparatus 

 every month or so and am always glad to send them 

 to college professors and other Interested scientists. 



PRICE-LISTS JUST ISSUED. 



Number 195. 



Eowland D'Arsonval Galvanometers ; Wall and 

 Table Patterns. 



Number 200. 



' ' W-S ' ' X-Eay Plants ; comprising seven outfits, 

 •with illustrated descriptive matter. 



Number 205. 



Cable Testing Apparatus, Meter Bridges, Con- 

 ductivity Apparatus, etc. 



Number 210. 



WillyouDg Adjustable Condensers, and Standard 

 Mica Condensers. 



Number 215. 



Elementary Laboratory Apparatus, chiefly Elec- 

 trical. 

 Number 225. 



Willyoung Induction Coils, with " Ideal " Auto- 

 matic Vibrator. 



James Q. Biddle, 



Dealer, Manufacturers' Agent and Importer, 



909 Drexel Buildingf, Pniladelphia. 



Pamhrian Tnecilc a large collection of Upper 

 balllUI lail ruaSilO. Mississippi Cambrian fossils 

 from the St. Croix (Potsdam) sandstone for sale. Mostly 

 Trilobites. Send for low prices. 



W. A. FINKELNBURG, WINONA, MiNN. 



Dec. 1, 1 896. Just Published. Sixth Edition of 



THE MICROSCOPE ^SSu'%E^T?.l'bT- 



By SIMON HENRY GAGE, Professor of Microscopy, His- 

 tology and Embryology in Cornell University and the 

 New York State Veterinary College, Ithaca, N. Y., U.S A. 

 Sixth edition, rewritten, greatly enlarged, and illustrated 

 by 166 figures in the text. Price, $1.50, postpaid. 



COMSTOCK PUBLISHING CO., Ithaca, N, Y. 



NEURAL TERiVlS, International and National. 



By BtiKT G. Wilder, M. D., Prof ssor of Neurology, etc., in 

 Coranl-Uniyersity. Ri-printHd from the Journal of compara- 

 tive Neukoloqy, VI., December. 1896 A treatis"- on tbe prin- 

 ciples and practice of anatomic -Noiuenclatnre wicb spf'cial refer- 

 ence to the brain, Pp. 137, including 7 I'ab'es. Price, postpaid. $1. 



Also, List of Neural i uma, wi h Comments and Bib iography, 

 beinff Phfis VIl-IX • f the above. 52 pp., of which 17 are occupied 

 by list of terms adopted by the Assoc, of Amer. Anatomi>*ta, the 

 Amer. Neur. Assnc ,ibe Amer Assoc, tor tbe Advanc, of Science, 

 and tu>- Auatomiacbe Ges IlMChaft. Price, posptpaid, 50 cents. 



Address HENRY COWELL, McGraw Hall, Ithaca, N. V. 



Harvard University. 



Lawrence Scientific School 



OrFERS COURSES IN 



Civil Englnefring, 



Mechanical Engineering, 



Electrical Engineering, 



Mining Engineering, 



Arc'iitecture, 



Chemistry, 

 Geology, 



Botany and Zoology, 

 General Science, 



Sclt-nce for Teachers, 



Anatomy and -Physiology (as a preparation for Medical Schools). 



For Descriptive Pamphlet apply I 



M. CHAMBERLAIN, Secretary, 



N. S. SHALER, Dean. 



Cambridge, Mass. 



Horsford's Acid Phosphate 



Is the most effective and agreeable 

 remedy in existence for preventing in- 

 digestion, and relieving those diseases 

 arising from a disordered stomach. 



D. W. W. Gardner, Springfield, Mass., 

 says: "I value it as an excellent preventive of 

 indigestion, and a pleasant acidulated drink 

 when properly diluted with water and sweet- 

 ened." 



Descriptive pamphlet free on application to 

 Rumford Chemical Works, Providence, R. I. 



Beware of Substitutes and Imitatioos. 



For sale by all Druggists. 



I will mail a finely finished original photo^ 

 cabinet size, of Sioux Indian Chief, SITTINQ 

 BULL, with his Signature. Have 200 sub- 

 jects, all different, of leading Western Indians. 

 First-elass work. Cabinet Size for 10 cents each. Some sent 

 on selection. Give reference. Aiter seeing sample you will 

 want others. Indian Costume, Ornaments and Weapons^ 

 15,000 Flint Stone Ancient Indian Kelics. 100,000 Mineral 

 and Fossil Specimens. Catalogue for stamp. 13th year. 

 L. "W. STILi'WEIili, Deadwood, South Dak. 



HOUGH'S "AMERICAN WOODS" 



A publication illustrated by actual specimens. 



WOODS FOR THE STEREOPTiCON 



Enabling you to show upon the screen characteristie 

 structures projected from nature itself. 



WOODS FOR THE MICROSCOPE 



Sections 1-1200 in. tiiick sliowing tliree distinct views ot 

 grain under eacti cover glass. 



WOOD SPECIMENS FOR CLASS USE 



Nothing equals these for use in the class-room. 



VIEWS OF TYPICAL TREES 



From Nature, photographs and stereopticon views. 



WOODEN CROSS-SECTION CARDS 



Perfectly adapted to printing (with type or steel plate), 

 painting, India ink work, etc. 



If you are interested in wood or trees in any way send for 

 our circulars and sample specimens. 



Address R. B. HOUGH, Lowville, N. Y. 



