SCENCE. 



[Vol. XIII. No. 311 







Superior to Silk or Wool. 

 A Protection against Colds, Neu- 

 ralgia and Rheumatism. 



SOLD BY LEADING MERCHANTS. 



WARNER BROS., 359 Broadway, New York, 



IMPROVED OIL LIGHT 



MAGIC LANTERNS. 



Also Lime and Electric Light Apparatus, and 

 meclianical. plain, and fine colored views. 



J. B. COLT & CO., Manufacturers. 

 No. 16 UfEKMAN .StKEET, NeW YoRK. 



Instiraiice. 



DELAY IS DANGEROUS. 



We call attention to the new form of Accident (indem- 

 nity) Insurance policies, which are written by the Mer- 

 chant's Casualty Insurance Association, 21 Park Row, 

 New York City. John S. Purdy, Secretary. These policies 

 cover weekly allowances of from $10 to $25, according to 

 occupation, at a cost of only $6 a year exclusive of the 

 cost to join, which is $5 payable once only. The public, 

 as a rule, carry life insurance, and the ordinary accident 

 policies issued by companies, paying a sum in case of 

 death, is not so desirable as one of these indemnity policies 

 in case of accidents, which are so plentiful in this fast age 

 with its railroad horrors, fast driving, electric wires and 

 other countless forms of danger to which the public is con- 

 ntly exposed. The fact of the Association having no 



unpaid cli 

 by the In; 

 that the 1 

 and 



id its having just passed an examination 

 : Bepartment of New York State, shows 

 lent is liberal with its policy-holders 

 1 its action. The Association also de- 

 sires to secure energetic Agents in every village and town, 

 to whom territory and favorable terms will be given. 



THE NEW 



E W- 5 



Comi>lete, with high-chisa 



lenses, 1 In. and 1-6 in. 



$28.00. 



Send for complete natalu^ue 



B.and sample of TlieAlicrii- 



^opical UuUetiu. 



,^5^tS? JAMES W, QUEEN & CO. 



j;SrtJ>.--;^-^^_ . jiakem of the Acme JlicroMcopei, 

 ■^""^ 924 Che.inut St., Phil.. 



^ 



'ho of Vergil' 

 ax adopted ' 

 id scholars 



— W.' 



fourth \— .^ ^-^ 



eQl States mJ I ^' 



INDIA P'^$EES 



..-« ^^ -r^ Stanlf. 



CORxw iS. 



illust 



Unrivalled for Dm^.;ility & Wear. 



Very new and hai taonie designs 



will be offered t ' is weels in 



SPRING ST yiiBS. 



Sdtoccdwau ckj \^ib 6i, 



New York. 



f.H.WALISLEY&CO. 



SUCCESSORS TO 



K. & J. BECK, 



1016 Chestnut Street Phiia 



Microscopes and all 

 Accessories and Ap- 

 paratus. Photograph- 

 ic nd Photo-Micro- 

 graphic Apparatus .ind 

 Outfits. 



Spectacles, Eye 

 Glasse: - Opera and 

 Marine lasses, etc. 



Illust. ued Price List 

 mailed free to any ad- 

 dress. Mention Science 

 in corresponding with us. 



^p-{ AMaTeur TriOTo O^Thts 



\ \ riTHTH^v^;^ 



laip 



"THE ECLIPSE." 



COPYING APPARATUS. 



One thousand copies m black. No 



special pen, no special paper, no 



stencil required. The " Eclipse " 



reproduces the natural handwriting 



so exceedingly faiiliful that in most 



-^ cases ^' Eclipse" circulars have been 



J' taken for ordinary written letters. 



j Specimens and circulars on applica- 



FELIX F. DAUS & CO , 



69S Broadw.iy, New 'i urk. 



r wvi 



P.O. 



GOOD E^EWS 

 TO L ADIES. 



ft-'red. Kow's your time to get 

 up orders for our celebrated 

 Teas and Coffees, and secure 

 a beautiful Gold Uand or Moss 

 Uose China Tea Set, Dinner Set. 

 Rose Toilet Set. "Watch, Brass Lamp, 

 t.sier M Kictionary. Forfull particulars addres- 

 ll<: (iKEAT AiMERICAJV TEA < O., 

 Box 289. 31 and 33 Veeey St.. New Vort. 



miiit siiis. 



We have just received several 

 cases of Novelty Silks for evening 

 wear, spcciaUy intended for the 

 approaching- season. The ground 

 colors are white and various deli- 

 cate gaslight shades, and are bro- 

 caded in Silver and Grold in very 

 unique designs. 



Orders by mail will receive care- 

 ful and prompt attention. 



JAMES MCCREERY& CO. 



BROADWAY AND ELEVENTH ST., 



NEW YORK CITY, 



J. GRUNOW 



631 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. 



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- 

 tional publishers in the country. 



BNGRAVINGS. 



For the largest list ever published of en- 

 gravetl portraits on .steel, suitable for illustrators 

 and print collectors, please send for catalogue 

 to J. C. BUTTRE, 



32 Cortlandt St., New York. 



H. WILLIAMS, 

 Dealer in Old Magazines, Reviews, &c. Scientific 

 periodicals a specialty. 39 Macdougal St., N.Y. 



JAHRESBERICHT DER CHEMIE [Fittica] 1877- 

 1SS5 inclusive ; 12 volumes in cloth, half goat. For sale 

 at cost. Also Register zu den Eerichten f iir 1867 bis 1876. 

 Address Scientific Library, Smith College, Northampton, 

 Massachusetts. 



JACK NUMBERS and complete sets of leading Mag- 

 i azines. Rates low. AM. MAG. EXCHANGE, 

 Schoharie, N.Y. 



FOR SALE.— Journal of the Franklin Institute, 

 Vols. I to 40. H.WILLIAMS. 



39 Macdougal St., N.Y. 



