SCIENCE. 



[Vol. XV hi. No. 460 



Wants. 



Atty person seeking a position /or which he is quali- 

 fied by his scientijic attainmenU^ or any person seeking 

 some one to fill a position of this character^ be it that 

 of a teacher of science^ chemist^ draughtsinan^ or what 

 not. may have the ' IVant' inserted under this head 

 FREE OF COST, if he satisfies the publisher of the suit- 

 able character of his application. A ny person seeking 

 information on any scientific question, the address of 

 any scientific man, or who can in any way use this col- 

 mnn for a purpose consonant with the nature of the 

 paper, is cordially invited to do so. 



WANTED.— A position in the philosopbieal or 

 pedagogical aBpartment of a college or uni- 

 ■versity by a young man (30) who has had five years' 

 practical experience In teaching, and who has done 

 four years' post-graduate work in philosophy, devot- 

 ing his attention during the last two years espe- 

 cially to study and original investigation in scien- 

 tific psychology and its applications in education. 

 Address E. A., care Science, 874 Broadway, N. Y. 

 City. 



WANTED.— A suitable position in Washington, 

 D. C, not connected with the Government, 

 and with a salary not to exceed £650 a year, by an 

 experienced biologist with six years' university 

 training. Applicant has been a skilful surgeon for 

 fourteen years ; is a practical photographer, car- 

 tographer, and accustomed to the use of the type- 

 writer. He is also capable of making the most fin- 

 ished drawings, of any description, for all manner 

 of illustrative purposes in science; trained in mu- 

 seum methods and wurk; also field operations and 

 taxidermy in its various departments, and model 

 ing, production of casts, restorations of paleonto- 

 logical specimens and similar employments. Address 

 U. S. E , care Science, 47 Lafayette Place, N. Y. 



WANTED. By a young man (87), B.A. andPh.D., 

 with three years' experience as assistant in 

 chemistry, position as instructor in chemistry or in 

 natural sciences in college or academy, or other ad- 

 vantageous position as chemist. Give particulars 

 as to work, salary, etc. P. W. MAR, L. Box 23, West 

 Haven, Cono^ 



A YOUNG MAN with an M.S. degree from Cornell 

 University desires a position as Professor or 

 Instructor in Physics or Electrical Engineering. 

 Address M. V. F., care Science, 47 Lafayette Place, 

 New york. 



WANTED— A position as Professor of Science by 

 a teacher of experience who has taken a post- 

 graduate course In biology. Address BOTANIST, 

 care Science, 47 Lafayette Place, New York. 



Exchanges. 



[Free of charge to all, if of satisfactory character. 



Address N. D. C. Hodges, 874 Broadway, New York.] 



For sale. — A 6}4 x 8?^ Camera; a very fine instrument, 

 with lens, holders and tripod, all new; it cost over $40; 

 price, $25. Edw. L. Hayes, 6 Athens street, Cambridge, 

 Mass. 



To exchange Wright's " Ice Age in North America " 

 and Le Conte's "Elements of Geology" (Copyright 1882) 

 for "Darwinism," by A R.Wallace, "Origin of Species," 

 by Darwin. "Descent of Man." by Darwin, ' Man's 

 Place in Nature," Huxley, "Mental Evolution in Ani- 

 mals," by Romanes, "Pre-Adamites," by Wiiichell. No 

 books wanted except latest editions, and books in good 

 condition. C. S. Brown, Jr., Vanderbilt University, 

 Nashville, Tenn. 



For Sale or Exchange for books a complete private 

 chemical laboratory outfit. Includes large Becker bal- 

 ance (200g to i-iom^), platinum dishes and crucibles, 

 agate motors, glass-blowing apparatus, etc. For sale in 

 part or whole. Also complete file of Silliman^s yournal, 

 1862-1885 (62-71 bound); Smithsonian Reports, 1854-1883; 

 U. S. Coast Survey. 18S4-1869. Full particulars to en- 

 quu-ers. F. GARDINER, JR., Pomtret, Conn. 



For exchange or sale at a sacrifice, an elaborate micro- 

 scope outfit. Bullock stand; monocular objectives, one- 

 sixth homeogeneous immersion, four-tenths, and three 

 inch, Bausch & Lomb, also one-fouith and one inch 

 Spencer. Four eye-pieces. Objectives are the best made. 

 Address Mrs. Marion Smitn, 41 Branch Street, Lowell, 

 M.1SS. 



For sale or exchange, extra fine pair ( 3 and ? ) of skins 

 of Rocky Mountain Goat, with the skulls, etc., as needed 

 for mounting ; collection of vertebrate fossils from the 

 Coup Fork Tertiary of Kansas ; collection of works on 

 descriptive cryptogamic botany — mostly on Fu7igi: thir- 

 teen vols, of Botanical Gazette, eight vols. Grevillea. 

 four vols. Notarisea; stereoplicon outfit, with attach- 

 ment for microscopic projection ; 148 stereoplicon slides, 

 illustrating zoology and cryptogam: 

 and foreign works and pamphlets on Vertebrate P 

 tology. and series oi Am. Jour, of Science and othi 



odicals 



ributi 



Vertebn 



Pala 



ology. Prof. F. W. Cragin, Colorado Springs, Colo. 



For INVENTORS. 40-page BOOK FREE. Address 

 W. T.Fitzgerald, Attorney at Law, Washington, D.C. 



PROTECTION FROM LIGHTNING. 



All the capital desired for the parent company 

 to handle my patents on a new method of protect- 

 ing buildings from lightning has been subscribed. 

 Sub-companies and agencies to introduce the 

 invention are forming, and any desirous of tak- 

 ing State-rights should address The American 

 Lightning Protection Co., Sioux City, Iowa. 



The English patent is for sale, and offers 

 an excellent opportunity for the formation of a 

 company now that the American company is so 

 favorably started. 



N. D. C. HODGES, 874 Broadway, New York. 



Cod-liver oil suggests con- 

 sumption; which is almost un- 

 fortunate. Its best use is be- 

 fore you fear consumption — 

 when you begin to get thin. 

 Consumption is only one of 

 the dangers of thinness. 



Scott's Emulsion of cod- 

 liver- oil makes the thin 

 plump, and the plump are 

 almost safe. 



Let us send you a book on 

 CAREFUL LIVING — free. 



Scott k Bowne. Chemists, 13a South 5th Avenue 

 New York. 



Your druggist keeps Scott's Emulsion of cod-live; 

 oil— all druggists everywhere do. $x. 



POSTAL DICTIONARY. 



A Manual of Postage Rates, and Inforniatiou 

 upon Every Postal Subject which concerns; 

 Merchants, Professional Men, Occasional 

 Correspondents, and All who Use the Mails. 

 Sixth edition, revised to date. 



Arranged in dictionary form, nomprising about 15CF 

 titles (with complete index of over 400 references), 

 debigned to furnish all faots bearing upon any par- 

 ticular topic, under its subject title. 



'■About as convenient a little book as we have seen 

 for some time. Costs only 15 cents, but ought ta 

 save at least that amount every other day, directly 

 or indirectly." — Chicago Standard. 



"Likely to be of great and constant service to ali 

 who make much use of the mails. The ninety-four 

 pages contain a great amount of information, very 

 well arranged, knowledge of which should prevent 

 most of the delays and losses in the mails."— Sos^on- 

 Literary World. 



"Worth its weight in gold to the busy 'man of 

 affairs *■ It will enable him to settle almost at a- 

 glance the points of inquiry in postal matters that 

 are constantly arising." — Neiv York Home Journal. 



"If all who use the mails (and who does not?) will 

 turn to the pages of this useful little guide, the labor 

 of the postal authorities will be greatly simplified, 

 fewer mistakes will be possible, and the public will 

 be better served. Its simplicity and low cost will 

 commend it to all. and give it what it deserves, a 

 universal sale."— -ffon. Thomas L. James, ex-Post- 

 master General. 



Price, 15 Cents, Po§tpaid. 



ADDRESS N. D. C. HODGES, 



874 Broadwray, New York. 



ESTERBROOK'S 

 STEEL PENS. 



Of SVPERIOR AND STANDARD QUALin. 

 Leading Kos.; 048, 14, 130, 135, 239, 333 



For Sale by all Stationers. 

 THE ESTERBROOK STEEL PEN GO., 



Works: Oamden, N. J. 20 John St., Kew York. 



Minerals, 



Rocks, 



Fossils, 



Casts of Fossils, 



Oeologieal 



Relief Maps. 



Ward'sNatural Science Establislimeni 



Mineralogy, Geology, Paleontology, Zoology, Osteology, Anatomy. 



Send for Circular. ROCHESTER, N. Y. 



stuffed Animals 



and Skins, 



Mounted 



Skeletons, 



Aiiiatoinical 



Models, 



IitTcrlebrates 



