SCIENCE. 



[Vol. XI. No. 274 



Used by thousands of flreNcIaas Mamiiactureis 

 aad Mechanics on their best work. Its succeps 

 3 broupht a Jot^of imitators copyin'T u 



These glues are used iu the Sinithsoniau Institute 

 at Washington for all its work of mouutiug speci- 

 mens—by the Government Ars6n.als and Department 

 Buildings, by the Pullman Palace Car Co., Mason & 

 Hamlin Organ and Piano Co., aad by thousands of 

 first-class manufacturers and mechanics throughout 

 the world. 1 or all kinds of fine work. Pronounced 

 STRONGEST ADHESIVE KNOWN. Sold in tin cans 

 for mechanics and amateurs, and in bottles for 

 family use. The total Quantity sold between Jan., 

 1880, and Jan., 188.5, m all parts of the world 

 amounted to over 32 million bottles. Be sure and 

 get the genuine LePage's made only by Russia 

 Cement Co. 



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. 



WM. S. KIMBAI..L & GO. 



. THE : 



GreatAmerican 



icood news 

 ' to l adies. 



ureateBt imlucemeiit^evcr of- 

 fered. !Now'8 your time to get 

 up orders for our celebrated 

 Teas and Coffees, and secure 

 a beautiful Gold Band or Mobs 



Rose China Tea Set, Dinner Set, 



Gold liand Moss Rose Toilet Set, "Watch, Brass Lamp, 



or Webster's Dictionary. For full particulars address 



THE GREAT AiMEBICAIV TEA VO., 



P. O. Box 289. 31 and 33 Veaey St., New Yort. 



W.H.WALMSLEY&CO. 



SUCCESSORS TO 



R. & J. BECK, 



1016 Chestnut Street, Phila, 



Microscopes and all 

 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. 



Xhe Travelers Insurance Company 



of Hartford, Conn., organized 1864, issues both Li/e 

 Policies and Accident Policies. Only large accident 

 company in America. Only $5 a year to professional 

 and business men for each $1,000 insurance, with $5 

 weekly indemnity. Has paid policy-holders nearly 

 $11,000,000. All policies non-forfeitable. All claims 

 paid, without discount, and immediately on receipt of 

 satisfactory proof. 



J. GRUNOW 



621 Sixth Avenue, New York 



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. 



JAYNE k CROSBY LETTER FILE. 



NO MANIPULATING TO OPEN, AND IS SELF-CLOSING. 



EACH WIRE ACTS INDEPENDENTLY OF THE OTHERS. 



ESTERBROOK'S 

 STEEL PENS. 



Of SVPERIOA AND STANDAUb QUALITY. 

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



rnr Sail- htf 'ill Slat ionrrs. 



THE ESTERBROOK STEEL PEN CO., 



Works: Camden, N.J. -J6 John .>«t.. »w Viirk. 



HYDRAULIC 



ELEVATORS and 

 WATER MOTORS. 



Setid /cr New Catalogue 



Tuerk Hydraulic Power Co. 



CHICAGO, NEW YORK. 



39 Dearborn St. 12 Cortlandt St. 



Mann's Keterence Indexes. 



References to and transcripts or translations of 'he lit- 

 fumished by B: PICKMAN 



Explanatory circular.^ 



Any paper Cciii he released b\ pulling it 



upwjid and tor\var<l. 

 Steel Wires Nickel Plated. 



Send for Descriptive Circular. 



JAYNE & CROSBY, 

 110 Liberty St., New York. 



If your stationer does not handle our goods, 

 write to us. 



PORTRAIT OF AGASSIZ. — Chapter 94 of The 



^ Agassiz Association has for sale photographs ot 

 Prof. Louis Agassiz 75 cents. Address C. B. Stebbins, 

 jO Day St., Somerville. Mass. 



A TEMPORARY BINDER 



for Science is now ready, and will be mailed 

 postpaid on receipt of price. 



Cloth 

 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- 

 ing. Filed in this binder. Science is- 

 always convenient for reference. 



N. D. C. HODGES, 



47 Lafayette Place, New York. 



President Ballard's Ne^r Book. 



THREE KINGDOMS: 



THE NEW HAND-BOOK O F T H E A. A. 

 IS NO^^r READY. 



It need scarcely be said that every member should have a copy of "Three Kingdoms. "^ 

 A handsome picture of " Professor Agassiz examining a Sea Urchin" forms the frontispiece of 

 the volume, every page of which is replete with interesting and important information. The 

 list of reference books, arranged topically, is the most valuable ever compiled. 



Price to Members, 60 cents. Regular price, 75 cents. 



THE WRITERS' PUBLISHING COMPANY. 



21 University Place, New York. 



r-m\f (i/\sTiN05= 



A=R=t1ART= iJ05=TRIPP, 

 (lenMana|?p. VPpes't. 



m ilujstr-atiVe 



AND ADVeRTISINQ 







