1 



Hhe only gewUiM jIP 



UNEQUALLED for CEMENTING 



wood, KlHSfl, clilDA, paper, leather, ic. Always 



'" UAnr DVTur ,„..„ . 



/COLD MEDALS. 



mm 



^USSI 



JjMJHDg^L'^D^.B.fDZrjs^ 



ussiaCement Co • , Smpie Mo'.iamps 



These glues are used in the Smithsonian Institute 

 at Washington for all its work of mounting speci- 

 mens — hy the Government Arsenals and Depart- 

 ment Buildings, hy the Pullman Palace Car Co., 

 Mason & Hamlin Organ and Piano Co., and by 

 thousands of first-class manufacturers and mechan- 

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 Pronounced STRONGEST ADHESIVE KNOWN. 

 Sold in tin cans for mechanics and amateurs, and 

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 between Jan., 18S0, and Jan., 1885, in all parts of the 

 world amounted to over 33 million bottles. Be 

 sure and get the genuine LePage's made only by 

 Edssia Cement Co. 



KIMBALL'S SATIN STRAIGHT 

 CUT CIGARETTES. 



People of refined taste who 

 desire exceptionally fine cigar- 

 f^'i'l /''' ettes sliould use only our 

 " ■' STRAIGHT CUT, put up 

 in satin packets and boxes of 

 los. 20S. 50s. and loos. 

 14 FIRST PRIZE MEDALS. 



^^^M. S. KIMBALL & CO. 



GOOD NEWS 

 TO L ADIES. 



Lireatest mduct'ineiiis ever of- 

 fered. Kow'3 your time to get 

 up orders for our celebrated 

 Teas and Coffees, and secure 

 a beautiful Gold Band or Moss 



Rose China Tea Set, Dinner Set, 



Gold liixna .iUoss Rose Toilet Set, AVatcb, Brass Lamp, 



or Webster's Dictionarr. For full particulars address 



THE GREAT AMERICAN TEA CO., 



P. O. Box 289, 31 and 33 Vesey St., New York. 



W.H.WALISLEY&CO. 



SUCCESSORS TO 



B. & J. BECK, 



1C16 Chestnut Street, Piiila. 



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. 



SCIENCE. 

 SPRING AND SUMMER 



DRESS_GOODS. 

 JAMES MCGREERY& CO. 



are now offering the foUowing 

 Unes ot Dress Goods : 



Check and Striped Cheviots 44- 

 inch, 75c.; 54-inch, 85c. and 

 $1.00; worth $1.00 and $1.35. 



The above are remarkable value. 



ORDERS ) from any part of the country 



BY y will receive careful and prompt 



MAIL ) attention. Mention this paper. 



JAMES McCREERY & CO. 



BROADWAY AND ELEVENTH ST., 



NEW YORK. 



[Vol. XI. No. 269 



HARVARD UNIVERSITY. 



■ill be ^\^ 



the following 



Courses of instruction 

 subjects during the sumi 



Botany, Chemistiy, Krench, German, Geology, History, 

 Physics, Physical Training, Topography. 



For information apply to the Secretary of Harvard 

 University. Cambridge, Mass. 



Mann's Reterence Indexes. 



ferences lo and transcripts or translations of the lit- 

 ire of ANY SUBJECT furnished by B: PICKMAN 

 MANN, Washington, D. C. 

 Correspondence fee, 50 cents. Explanatory circulars 



i^%y^€|^ BcO0-o# JS-f-T^ifO^ AND - 



The Travelers Insurance Company 



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

 Policiei 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 Ail claims 

 paid, without discount and immediately on receipt of 

 satisfactory proof 





A TEMPORARY BINDER 



for Science is now ready, and will be mailed 

 postpaid on receipt of price. 



Cloth _ - 50 cents. 



Half Morocco - 75 cents. 



This binder is strong, durable and 

 legant, has gilt side-title, and allows 

 he opening of the pages perfectly 

 Any number can be taken out 

 r replaced without disturbing the 

 thers. and the papers are not muti- 

 ited for subsequent permanent bind- 

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 Iways convenient for reference. 



N. D. C. HODGES, 



47 Lafayette Place, New Yorli. 



TILESTON & HOLLINGSWORTH, 



64 Federal Street, Boston. 



Manufacturers of Fine Book Papers for let- 

 ter press and cut printing. 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- 

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4RG4INS m BOOKS, AUTOGRAPHS, ETC 

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Sm HI\5T1N05= A=R=nART= =J05=TRIPK 



Fpes't Oet\riatw^ei>. VPpes't. 



•tl 



FOR 





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