SCIENCE. 



[Vol. XIX. No. 465 



TVan^s. 



Any person seeking a position /or ivhich he is quali- 

 fiedby kis scientijic attaininen^.s^ or any person seeking 

 sovie one to fill a position of this character^ be it thai 

 of a teacher of science., chemist y draughtstnan, or -what 

 not, tnay have the ' JVant^ inserted under this head 

 FREE OF COST, ifi he Satisfies the Publisher ofi the suit- 

 able character ofi his application. Any person seeking 

 infiorntation on any scientific question., the address of 

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

 umn fior a purpose consonant Tvith the nature ofi the 

 paper., is cordially invited to do so. 



Exchanges. 



WANTED. -5c/e«ce, No. 178, July 2, 1886, also 

 Index and Title-page to Vol. VII. Address 

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



A YOUNG MAN (31) would lite a position in i 

 college, laboratory, or observatory, is also will 

 ing to assist at a steam engine, etc. Address J. "W. 

 care of Science, 874 Broadway, New York. 



WANTED.— A position in the philosophical or 

 pedagogical department 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 sis 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 work; 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. R., care Science, 47 Lafayette Place, N. Y. 



WANTED.-By ayoungmaa(27), B. A. and Ph.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. F. W. MAR, L. Box 23, West 

 Haven, Conn. 



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



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



Wanted to buy or exchange a copy of Holbrook's 

 North American Herpetology, by John Edwards. 5 vols. 

 Philadelphia. 1842. G. BAUR, Clark University, 

 Worcester, Mass. 



For sale or exchange, LeConte, *' Geology;" Quain, 

 "Anatomy," 2 vols,; Foster, *'Physiology," Eng. edition; 

 Shepard, Appleton, Elliott, and Stern, ** Chemistry ;" 



Jordan, "Manual of Vertebrat 

 lists' Director^';" Vol. I. ^our 

 four, " Erabryology,'' 2 vols 

 Science, 18 vols., unbound. 

 Lexington, Ky. 



For sale.— A 6^ x S% Camera; a 

 with lens, holders and tripod, all r 

 price, $25. Edw. L. Hayes, 6 Atht 



alS. 

 lofi Morphnlogy: Bal- 

 Leidy, ** Rhizopods;" 

 :. T. McCLINTOCK, 



very -fi 



lew; it cost over $40; 



ns street, Cambridge, 



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 Dar\vin, 'Man's 

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

 mals," by Romanes, "Pre-Adamites,'* by Winchell. 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 (20og. to i-iomg ), platinum dishes and crucibles. 

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

 part or whole. Also complete file of Silli7nan''s Journal, 

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

 U. S. Coast Survey. 1854-1869. Full particulars to en- 

 quirers. F. GARDINER, JR., Pomfret, Conn. 



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

 scope outfit. EuHock stand; monocular objectives, 

 sixth homeogeneous immersion, four-ten ' 

 inch, Bausch & Lomb, also one-fouith 

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

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

 Mass. 



nd thn 



PATENTS 



For INVENTORS. 40-page BOOK FREE. Address 

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



PROTEC TION FROM LIGH TNING. 



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 lor sale, and offers 

 excellent opportunity for the formation of a 

 \any now that the American company is so 

 ^ly started. 



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



There is ease for those far 

 gone in consumption — not 

 recovery — ease. 



There is cure for those not 

 far gone. 



There is prevention — bet- 

 ter than cure — for those who 

 are threatened. 



Let us send you a book on 

 CAREFUL LIVING and Scott's 

 Emulsion of cod-liver oil, 

 even if you are only a little 

 thin. 



Free. 



Scott & Bowne, Chemists. x\i South sth Avenue, 

 New York. 



Vniir druggist keeps Scott's Emulsion of cod-liver 

 oil — all druggists everywhere do. |i. 



POSTAL DICTIONARY. 



A Manual of Postage Bates, and Information 

 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, comprising about 150 

 titles fwith complete index of over 400 references), 

 designed to furnish all facts 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 to 

 save at least that amount every other day, directly 

 or indirectly."— Chicago Standard. 



"Likely to be of great and constant service to all 

 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'iosses in the mails."— Boston 

 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."— iYcjo York Borne Journal, 



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

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 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."— ilon. Thomas L. James. ex-Post- 

 master General. 



Price, 15 Cents. Postpaid. 



ADDRESS N. D. C. HODGES, 



8 74 Broad^vay, Ne^v 'Yorlt. 



BOOKS : HoAV to Exelianae tliem for 



otliers. Send a postal to the Science exchange 

 column (insertion free), stating briefiv what you 

 want to exchange. Science, 874 Broa'dway, Ne^v 

 York. 



ai5cience 



""fineralogy, Geology, Paleontology, Zoology, Osteology, Anatomy. 



\end for Circular. ROCHESTER, N. Y. 



SUilTeci Animals 



and Skins, 



Monnted 



Skeletons, 



Anatomical 



models, 



IiiTcrtebrates 



