PstPPl FoAet Can Nn^^asfe 



Glue IS manufactured EoIeJy by the 



RUSSIA CEMENT CO. 



GIOUCESTER, MASS. 



Send 10c and dealers' card 



3oesn t keep i* m atoclt, for sample. 



J. GRUNOW 



631 Sixth Avenue, New T 



Established 1852. 



Microscope Stands, 

 Oil Immersion Object- 

 ives and Abbe Con- 

 densers for Bacterial 

 and Histological work, 

 of Objectives, Camera 

 Lucida and other ac- 

 cessory apparatus, 



W. H. WALMSLEY & CO. 



SUCCESSORS TO 



B. & J. BECK, 



1016 Chestnut Street Phila. 



Microscopes and afl 

 Accessories and Ap- 

 paratus. Photograph- 

 ic and Photo-Micro- 

 graphic Apparatus and 

 Outfits. 



Spectacles, Eye 

 Glasses, Opera and 

 Marine Glasses, etc. 



Illustrated Price List 

 mailed free to any ad- 

 dress. Mention Science 

 in corresponding with us. 



HYDRAULIC 



ELEVATORS and 

 WATER MOTORS. 



Send for New Catalogite 



Tuerk Hydraulic Power Co. 

 CHICAGO. NEWYORK. 



39 Dearborn St. 12 Cortlandt St. 



UNDERWOOD'S 

 WRITING FLUIDS, 



Used by United States Government in all Departments, 

 and by Leading Banking and Mercantile Houses. Send 

 for Samples. 



J. UNDERWOOD & CO. 



163 La Salle St., Chicago. 30 Vesey St., N.Y. 



SCIENCE. 



ESTERBROOK'S 

 STEEL PENS. 



OF SUPERIOR AND STANDARD QUALITY. 

 Leading Nos.; 048, 14, 130, 135. 239, 333 



For Sale h;/ all Stationers. 



THE ESTERBROQK STEEL PEN GO., 



Works : Camden. N. J. -JC John St., Sew York. 



KIMBALL'S SATIN STRAIGHT 

 CUT CIGARETTES. 



People of refined taste who 

 desire exceptionally fine cigar- 

 ettes should use only our 

 STRAIGHT CUT, put up 

 in satin packets and boxes of 

 lOs. 20S. 50s. and lOOs. 

 14 FIRST PRIZE MEDALS. 



VVM. S. KIMBALL & CO. 



GOOD NEWS 

 TO LADiES. 



fered. i\uw's yuiir time to get 

 up orders for our celebrated 

 "■ and Coffees, and secure 



Liand -Moss Rose Toilet Set, Watch, Brass Lamp, 

 Wpbpter'9 Dictionary. For full particulars address 

 THE GREAT AiMERICAIV TEA VO.. 



'. O. Box 289. 31 and 83 Vesey St., New Tork. 



TILESTON & HOLLINGSWORTH, 



64 Federal Street, Boston. 



Manufacturers of Fine Book Papers for let- 

 ter press and cut priming. The attention of 

 publishers and printers is called to our Ivory 

 Finish (no gloss) paper. A boon to studious 

 men. reflecting no dazzling glare injurious to the 

 eyes. Approved and used by the best educa- 

 tional publishers in the country. 



A TEMPORARY BINDER 



for Science is now ready, and will be mailed 

 postpaid on receipt of price. 



Half Mo 



75 ' 



This binder is strong, durable and 

 elegant, has gilt side-title, and allows 

 the opening of the pages perfectly 

 flat. Any number can be taken out 

 or replaced without disturbing the 

 others, and the papers are not muti- 

 lated for subsequent permanent bind- 

 Filed in this binder, Science is 



always 





N. D. C. HODGES, 



47 Lafayette Place, New York. 



[Vol. XII. No. 2i 



A NEW CORSET. 



JAMES McCREEKY & CO. are 

 introducing- a Corset wliicli they 

 recommend, as the best they have 

 ever had at the price — one dollar. 

 They are made In white and in 

 drab, are silk-stitched, edged with 

 lace, and are perfect fitting. 



MAIL ORDERS ARE PROMPT- 

 LY EXECUTED. 



JAMES McCREERY & CO. 



BROADWAY AND ELEVENTH STREET, 



NEW YORK. 



jp- r>. & Co 



(Royle s Patent) 



SELF-POURING 

 COFFEE and TEA ^ 



POTS. e\ 



< f « 



PAINE, DIEHL & CO., Philada., Pa. 



Unalterable 



GLUE 



&. Fraffarnt 



PASTE 



- and glue for 



A strong and harmless preparation of flo 

 Photographers, Manufacturers, Mercha 

 Companies, Banks, and family and office use. Contains 

 no acids. Unlike Mucilage, adheres and dries immedi- 

 ately. N. Y. Liquid Glue and Adhesive Co., Preparers 

 of Peter Cooper's Glue in Liquid Form, 18 N. William 

 St., New York. Used in this office. 



if^W H)\5T1N0S= 

 i}'-! Fpes't. 



'A=R-flART= -JOS^TRIPP. 

 Oet^■Mat^i^^l^ VPpes't. 



1j^0T0 = 



ftN(4RW/IN(j 



I SIllDstratiVe 



AND ADVERTISING 



BKjWCH-AT 7^'a-C>lE5TttUr3T! 

 )PllllsADELPlliA.tP/^' 



1nE.W YORK;-! 



