iv 



SCIENCE. 



BRAIN AND 



NERVE FOOD 



.VITALIZED PHOS-PHITES, 



Composed of the Vital or Nerve-giving Principles of the Cx-Brain and Wheat-Germ. 



IT RESTORES THE ENERGY LOST BY NERVOUSNESS OR INDIGESTION ; RELIEVES LASSITUDE, ERRATIC PAINS AND 

 NEURALGIA REFRESHES THE NERVES TIRED BY WORRY, EXCITEMENT, OR EXCESSIVE BRAIN FATIGUE ; STRENGTH- 

 ENS A FAILING MEMORY, AND GIVES RENEWED VIGOR IN ALL DISEASES OF NERVOUS EXHAUSTION OR DEBILITY 

 IT IS THE ONLY PREVENTIVE OF CONSUMPTION. 



IT GIVES VITALITY TO THE INSUFFICIENT BODILY OR MENTAL GROWTH OF CHILDREN, PREVENTS FRETFULNESS 

 AND GIVES QUIET, REST AND SLEEP. IT GIVES A BETTER DISPOSITION TO INFANTS AND CHILDREN, AS IT PRO- 

 MOTES GOOD HEALTH TO BRAIN AND BODY. 



PHYSICIANS HAVE PRESCRIBED 300,000 PACKAGES. For Sale by Druggists or by Mail, fi. 



F. CROSBY, 664 & 666 Sixth Ave., N. Y.-London, 137 A Strand. 



DRAWING INSTRUMENTS 



And Materials of all kinds. 



OPTICAL INSTRUMENTS, 



Microscopes, Telescopes, &c. 

 G. S. WOOLMAN, 116 Fulton Street, 



NEW YORK. 

 Send for 1 1 [us. Catalogue, and mention this Journal. 



Successful Novels. 



MR. PERKINS^ DAUGHTER. 



By the Marchioness Clara Lanza. 

 Note. — 11 It mav be well to mention, that the state of 

 ' double consciousness,' or 1 Periodical Amoesia,' described In 

 one of the principal personages ol this story, is not bv any 

 means an isolated instance. It is, on the contrary, a pheno- 

 menon well known tu neurological physicians," 



G. P. PUTNAM'S SONS. 



27 West 23rd St., New York. 



GLACIERS. 



Illustrations of the Earth's Surface, by 

 Nathaniel Southgate Shaler, Professor of 

 Palaeontology, and William Morris Davis, In- 

 structor in Geology in Harvard University, with 

 Maps and 29 Heliotype Reproductions of Photo- 

 graphs by Braun of Dornach, and others, of Gla- 

 ciel Scenes, forming a handsome, large folio vol- 

 ume. This important new work will be mailed on 

 receipt of 'len Dollars forwarded to office of 

 " Science." 



American Journal of Science. 



Founded by Prof. Silliman in 1818. 

 Devoted to Chemistry, Physics, Geology, Physi- 

 cal Geography, Mineralogy, Natural History, 

 Astronomy, and Meteorology. 



Editors: Jas. D. Dana. Edw. S. Dana and B. Sili.iman. 



Associate Editors: Professors Asa Gray, J. P. Cooke, Jr., 

 and John Tbowbbidgk, of Cambridge ; H. A. Newton and 

 A. E. Verkill, of Yale ; and G. F. Barker, ol the Univer- 

 sity of Pennsylvania, Phila. Subscription Price $6 ; 50 Cents 

 a Number. Address the Proprietors. 



James D.& E. S. Dana, New Haven, Conn. 



■^J^JMS** * SCHRAUER'S MICROSCOPES. 



THROUGH TRAINS Via. N.Y., N. H. A H. R. R. 



Between Boston and New York. 



FROM GRAND CENTRAL DEPOT. 

 Leave New York, 4.00 P.M., with hlegant Tbrouffh Car. 

 " " " 11.35 P.M., weekdays, with Through New 



Pullman Sleepers. 

 '• " " 10.30 P.M., Sundays. 



FROM DEPOT, FOOT OF SUMMER ST. 

 Leave Boston, 9.00 A.M., week days, with Through Cars to 

 Grand Central Depot. 

 11 " 10.40 P.M., daily, with elegant new Pullman 

 Sleepers. 



The new model Physician's Microscope has 

 been designed with a view to combine the most 

 advanced scientific ideas with first-class workman- 

 ship and moderate cost. 



A printed prospectus, giving full details ana 

 price of this instrument, forwarded on mention- 

 ing this Journal. 



Office & Manfac'y, 228 E, 34th St., N. Y. 



TARE THE BEST. 



The International Review. 



NEW MONTHLY SERIES. 



JOHN T. MORSE, Jr., HENRY CABOT LODGE, Editors. 



Price 50 Cents a month ; $5.00 a year. Specimen copies sent post-paid 

 n receipt of 15 cents. 



AGENTS WANTED who understand the character, scope 

 and value of the Review, to solicit subscriptions. 



A.. S. BARNES & OO ., 



in & 113 William Street, New York. 



II. M. RAYNOE, 



No. 25 Bond St., 



NEW YORK. 



(Established 

 1859) 



FOR ALL 



Laboratory 



AND 



Manufacturing Purposes. 



Wholesale and Retail. 



Scrap Purchased 



Circulars by Mail 



BEST MEDIUM FOR ADVERTISERS. 



SCIENCE 



Circulates in Every State in the Union, also Canada, Australia, 

 Japan and Europe. 



ALL UNIVERSITIES and COLLEGES. 



Subscribers to M Science " arc chiefly among those having few facilities 

 for purchasing goods, and are buyers of Fancy Articles, Household Neces- 

 sities, Jewelry, Musical Instruments, Dry Goods, Books, Prints, Scien- 

 tific Instruments and Apparatus ; Pure Chemical Substances, Mineral 

 Waters, Novelties and Specialties of every kind. 



Terms for A dvertising moderate. Small advertisements on this page 

 $50 a year (52 insertions). 



OPTICAL INSTRUMENTS. 



BAROMETERS, THERMOMETERS, 



RAIN GAUGES, htc, Etc. 

 BENJ. PIKE'S SONS & CO., 

 OPTICIANS, 



No. 928 Broadway, New York. 



Illustrated Catalogue sent free on mentioning 

 " Science." 



MEYROWITZ 



BROTHERS, 



OPTICIANS, 



297 Fourth Ave., N. Y. 



S. E. COR. 23D ST 



R. & J. BECK, 



Manufacturing Opticians, 



1016 Chestnut St., Philadelphia. 



MICROSCOPES, 



And all Accessories of the HIGHEST Grades at 



the Lowest Pricks. 

 Illustrated Condensed Price List, 32 pages. Free. 

 Full Catalogue of 176 Pages. 15 cts. 

 Mention this Journal. 



Trial Cases. Opthalmos 

 copes. A rtijical Eyes, Clinical 

 Thermometers, Microscopes, 

 Electric Batteries, etc. 



Special attention given to 

 prescriptions 0/ Oculists. 



N. B.— An Illustrated Catalogue will 

 be sent free upon request. 



American Naturalist. 



Devoted to the Natural Sciences in their 

 widest sense. 

 Publishpd Monthly. 

 Terms, $4.00 a year. Single numbers, 35 cents. 



Editors: 



Professor A. S. Packard, |r., and Professot 



E. D. Cope. 

 McCalla & StavelY, Publishers, Nos. 237-9 

 Dock Street, Philadelphia, Pa. 



