SCIENCE. 



[Vol. XII. No. 2i 



Patent Pock t C -in 



ber that THE 



Repairs Everything, 



has brought a lot 



B°^i GENULSE LePas, 



Glue is maDof actured solely by the 



RUSSIA CEMENT CO. 



GLOUCESTER, MASS. 

 Send 10c. and dealers' card who 

 ocli, tor sample. 



KIMBALL'S SATIN STRAIGHT 

 CUT CIGARETTES. 



People of refined taste who 



M^ desire exceptionally fine cigar- 



Wi ettes should use only our 



f\) STRAIGHT CUT, put up 



in satin packets and bo,xes of 



los. 20s. 50s. and loos. 



:4 FIRST PRIZE MEDALS. 



^\^M. S. KIMBALL & CO. 



W.H.WALISLEY&CO. 



SUCCESSORS TO 



B. & J. BECK, 



1016 Chestnut Street Phiia, 



Microscopes and all 

 Accessories and Ap- 

 paratus. Photograph- 

 ac and Photo-Micro- 

 graphic Apparatus and 

 Outfits. 



Spectacles, Eye 

 Glasses, Opera and 

 Marine Glasses, etc. 



Illustrated Price Lisl 

 mailed free to any ad- 

 dress. Mention Science 

 in corresponding with us. 



631 Sixtli Avenue, >ew "iork 



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. 



HYDRAULIC 



ELEVATORS and 

 WATER MOTORS. 



Send /or New Catalogue 



Tuerk Hydraulic Power Co. 



CHICAGO. NEW YORK. 



39 Dearborn St, 12 Cortlandt St. 



STERBROOK'S 

 STEEL PENS. 



OF SUPERIOR AND STANDARD QUALITY. 

 Leading Nos,: 048, 14, 130, 135, 239, 333 



For Sale by all Stationers. 



THE ESTERBROOK STEEL PEN 00., 



Works: Camden, N.J. •JGJoliuSt., New York. 



TO LADIES. 



!r-'- up orders for our celebrated 



teas and Coffees, and secure 



I a beautiful Gold Band or Moss 



I:: 1 ;ose China Tea Set, Dinner Set, 



i' - Toilet Set, Watch, Brass Lamp, 



jr \\ i':i-' rr s iMriii»[i;iry. For full particulars address 



'iin^ GREAT AMERICAX TEA iO., 



P. O. liox :iS9. 31 and 33 Vesey St., Kew Tort. 



Unalterable t^77*^^^2^^~W*' ^ Fragrant 



GLUE*^** PASTE 



A stron,ff and harmless preparation of flour and glue for 

 Photographers, Manufacturers, Merchants. Insurance 

 Comjiani^. 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. 



TILESTON & HOLLINGSWORTH, 



64 Federal Street, Boston. 



Manufacturers of Fine Book Papers for let- 

 ter press and cut priming. The aitention of 

 publishers and primers 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 counlry. 



* NEW MAGAZINE-THE SWISS 



11 Devoted to spreading a love of PDnCQ 



*9 nature among tlie peapie. Edited V 11 VJ O O 

 by Hablan H. Ballard, President of the Agassiz Asso- 

 ciation, and succeedinsr St. Nichnl s as the official maga- 

 zine of that body. Sl.oOayear. Sample copy lOcents, or25 

 jentB for trial subscrtDnnn f or S months. 



N, D. C. HODGKS, Publisher, 

 Mention this paper. 47 Lafayette Place, New York. 



MAGAZ/n/ES AND REVIEWS!! 



Complete sets of all the leading Magazines and Reviews 

 and back numbers of several thousand periodicals, for 

 sale at low rates. Full files of ScicJice^ either bound 

 or unbound, or odd volumes and numbers supplied. Sub- 

 scriptions taken on favorable terms for any periodical 

 either American or foreign. Address 

 THE AMERICAN AND FOREIGN MAGAZINE 

 DEPOT, 47 Dey street, New York City. 



Wa7zts. 



/IN EDUCATED AND CAPABLE PERSON 

 wanted in ever^' town and city to canvass for sub- 

 scriptions to Science; liberal compensation. Address, 

 naming references, Publisheh of Science, 47 Lafayette 

 Place, New York city. 



A NEW CORSET. 



JAMES McCREEKY & CO. are 

 introducing- a Corset whicli 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 McCEEERY& CO. 



BROADWAY AND ELEVENTH STREET 



KEW YORK. 



I»- I>. & Co. 



(Royle's ratent) 



SELF-POURING 

 COFFEE and TE* 



POTS. 



the Teapot. SAVES at least 2o per rent of Tea . 

 the Tea proportionately better Send fur Litit^ 



PAINE, DIEHL & CO , Philada , Pa. 



A TEMPORARY BINDER 



for Scie?zce is now ready, and will be mailed 

 postpaid on receipt of price. 



Half Morocco - 75 cents. 



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- 

 ing. Filed in this binder, Scieiice is 



N. D. C. HODGES, 



47 Lafayette Place, New York. 



y*io"ro= 



TIHQIW/INQ 



i:\im HA5riN0S= --A=R=flART= 'JOS^TRIPR 

 Fpes^t. (jervMar^?R. VPpes't, 



I SIluustratTVe 



AND ADVERTISINQ 



EI^MCH-AT 7.2a.C^E3TMUr,5T! 

 jpjIltADELPlllATP/^' 



^-jlSPhRK JPtACE-, 



!nE.W YOR.K,J- 



