SCIENCE. 



[Vol. XVIII. . No. 464 



Wants, 



Any person seeking^ a position /or ivhick ke is qjiali- 

 fiedby kis scientijic attainments^ or any person seeking 

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

 of a teacher of science ^ckeTtiist^ d'raughtsjnan^ or -what 

 not^ may have the ' IVant^ inserted tinder this head 

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

 able character of his application. Any person seeking 

 information o?i any scientific question^ the address of 

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

 umn for a purpose consonant 'with the nature of the 

 paper ^ is cordially invited to do so. 



WANTED. — ^Ci'eiice, No. 178, July 2, 1886, also 

 Indes and Title-page to Vol. VII. Address 

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



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

 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 mau (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 5650 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 work; also field operations and 

 taxidermy in its various departinents, and model- 

 ing, production of casts, restorations of paleonto- 

 logical specimens and similar employments. Address 

 TJ. S. R., care Science, 47 Lafayette Place, N. Y. 



WANTED.-By a young man (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. 



Exchanges. 



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

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



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 Vertebrates;" " Internaiional Scien- 

 tists* Directory;" Vol. L Journal of Morphology .- Bal- 

 four, " Embryology,'' 3 vols.; Leidy, " Rhizopods:" 

 Scie?tce, 18 vols., unbound. C. T. McCLINTOCK, 

 Lexington, Ky. 



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

 with lens, holders and tnpod, 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 VVinchell. 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-iomg ), platinum dishes and crucibles, 

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

 part or whole. Also complete file of Silli?nan''s jfournal:, 

 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. 



Fore 



change or sale at a sacr 

 scope outfit. Bullock stand; m 

 sixth homeogeneous immersion 

 inch, Bausch & Lomb, also c 

 Spencer. Four eye-pieces. Obj' 



fice, an elaborate micro- 



, four-tenths, and three 

 ne-fourth and one inch 

 the best made. 



Smith, 41 Branch Street, Lowell, 



For INVENTORS. 40-pag6 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 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. 



Before the cause of con- 

 sumption was known (that 

 was only a few years ago) 

 we did not know how Scott's 

 Emulsion of cod-liver oil did 

 so much good in consumption 

 and in the conditions that 

 lead to consumption. 



The explanation is inter- 

 esting. We send it free in 

 a book on careful living. 



Your druggist keeps Scott's Emulsion of cod-liver 

 oil— all druggists everywhere do, %i. 



POSTAL DICTIONARY. 



A Manual of Postage Rates, 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 dictinnary form, comprising about 150 

 titles Cwith 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 

 wel! arranged, knowledge of which should prevent 

 most of the delays and tosses 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." — New York Home Journal. 



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

 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 ail. and give it what it deserves, a 

 universal sale."— fi'on. TJiomas L. James, ex-Post- 

 master General. 



Price, 15 Cents. Postpaid. 



ADDRESS N. D. C. HODGES, 



874 Broadwray, New Xorfe. 



ESTERBROOK»S 

 STEEL PEi^S. 



OF SUPERIOR AND STANDARD QUALITY. 

 Leading Nos.: 048, 14, 130, 135, 239, 333 



For Sale by all Stationers, 



THE ESTERBROOK STEES. PEN CO., 



Works: Oamden, N. J. '26 John J"'t., New Vork. 



Minerals, 



Rocks, 



Fossils, 



Casts of Fossils, 



Oeological 



Relief Maps. 



sMurai science tsiB! 



Mineralogy, Geology, Paleontology, Zoology, Osteology, Anatomy- 

 Send for circular. ROCHESTER, N. Y. 



{StufiTed Animals 



and Skins, 



Mounted 



Skeletens,^ 



Anatomical 



Models,. 



InTertebrates 



