QUSTAV E. STECHERT, 



766 Broadway, New York. 

 Importer of Scientific Books and Periodicals. 

 Branches : Leipzig, Hospital Str. 16 ; London, 26 

 King William Str., Strand. 



B % WESTERMANN & CO., 



(Established 1848,> 



838 Broadway . . . NEW YORK, 



FOREIGN BOOKSELLERS AND IMPORTERS. 



MAGAZINES 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 Science, either bound or unbound, or odd 

 volumes and numbers supplied. Subscriptions taken on favorable 

 terms for any periodical either American or foreign. Address 

 THE AMERICAN AND FOREIGN MAGAZINE DEPOT, 

 47 Dey street, New York City. 



GERMAN SIMPLIFIED. 



An eminently practical new method for learning the German lan- 

 guage. Edition for self-instruction, in 12 numbers, at 10 cents each, 

 sold separately ; school edition (without keys), bound in cloth. $1.25. 

 For sale by all booksellers ; sent post-paid on receipt of price by Prof- 

 A. KNOFLACH, 140 Nassau St., New York. Prospectus mailed free. 



I 



"THE ELECTRICAL REVIEW," 



Anillustruted weeklyjournal,istheacknowledgcd lead- 

 er iu the world of electrical science. Edited with care, 

 ita editorial opinion is reliable.its news columns bright 

 aud instructive. $3.00 per year; single copies, 10 cents. 

 23 PARK ROW, NEW YORK. 

 pp?r advertising medium in the electrical field. 



James W. Queen&Co, 



Manufacturing Opticians, 



924 CHESTNUT ST., PHILADELPHIA, 



OPTICAL AND SCIENTIFIC INSTRU- 

 MENTS OF ALL KINDS. 



PUBLISHERS OF THE 



MICROSCOPICAL 

 BULLETIN. 



(Sample free ) 



We Publish our 



igues 



in Parts, as follows, and will mail 

 upon application such as may be desired by those interested. 

 Fart i. Mathematical Instruments, Drawing Paper, etc. 162 pp. 

 Part 2. Optical Instruments, including Spectacles, Microscopes, etc. 

 188 pp. 



Part -za (supplement). Astroncmical Telescopes and Accessories. 35 pp. 

 Part 2b (supplement^. Opera, Field and Spy Glasses. 32 pp. 

 Part 26- (supplement). Second-hand and other Microscopes, Objectives, 

 etc. 16 pp. 



Part 3. Projecting Lanterns and Slides. 350 pp. 

 Part 4. Physical Instruments. 250 pp. 



Part 4<z ^supplement). Chemical Apparatus, Balances, etc. 50 pp. 

 Part 4/; (supplement). Second-hand Physical and Chemical Apparatus. 

 16 pp. 



Part 46- (supplement). Chemicals. 48 pp. 



Part 5. Meteorological Instruments, Hydrometers, etc. 120 pp. 

 Part 6. Photographic Cameras, Lenses and Materials. 48 pp. 



PRIZES OFFERED BY THE BOSTON 

 SOCIETY OF NATURAE HISTORY. 



IT STANDS AT THE HEAD." 



THE WALKER PRIZES, APRIL, 1886. 



The Society offers a first prize of from $60 to $100, and 

 a second prile of $50, for the best memoirs in English, on the 

 following subject: 



"Original unpublished investigations on the embryology of 

 any plant." 



The essays are to be sent to the Secretary of the Society, 

 on or before April 1, 1886, accompanied by a sealed envelope, 

 endorsed with a motto corresponding to one on the essay, 

 containing the name and address of the writer of the essay, 

 which must not, in any way, be apparent in the manuscript. 



Boston, Mass. EDWARD BURGESS, Secretary. 



" SATIN » 



STRAIGHT CUT 



CIGARETTES 



Have at once come into popular 

 favor because of their Su- 

 perior Excellence. 



14 FIRST PRIZE MEDALS. 



WM. S. KIMBALL & CO. 



One touch of the finger should produce any character used 

 by the operator of a writing machine; instruments that fail to 

 accomplish this are deficient and do not fully meet the neces- 

 sity that brought them forth. These facts are self-evident. 



The No. 2 " Caligraph " is the only writing machine that 

 fully economizes time and labor, and economy of time and 

 labor is the best reason we know for soliciting trade. 



Granting that we are at the front in this, we can show that 

 our lately improved machines excel in mechanical merit, 

 durability and beauty of work. 



io.oco " CALIGRAPHS " ARE IN DAILY USE. 



We publish.100 letters from prominent men and firms which 

 are convincing. 



For specimens, etc.. address, 



THE AMERICAN WRITING MACHINE CO., 



HAItTFORl), COJSN. 



New York Ojfice, 



23? Broadway. 



