SCIENCE. 



[Vol. XVIII. No. 45S 



Wants. 



A 7ty person seeking a fiosHion yor ivkich ke is quali- 

 fied by his scientific atiainTnents^ or any person seeking 

 some one to fill a position 0/ tkis character^ be it that 

 0/ a teacher 0/ science^ chemist^ draughtsman, or -what 

 not^ may have the ' Want^ inserted itnder this head 

 FREE OF COST, if he satisfies the Publisher 0/ the suit- 

 able character 0/ 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- 

 umn for a purpose consonant •with the nature of the 

 paper., is cordially invited to do so. 



WANTED.— A suitable position in WashiDgton, 

 D. C, not connected with the Government, 

 and with a salary not to exceed S650 a year, by an 

 experienced biologist with six years' university 

 training. Applicant has been a skilful surgeon for 

 fourteen years; is a practical photographer, char- 

 tographer, and accuMtomed 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- 

 iDg, production of casts, restorations of potaconto- 

 logical specimens and similar employments. Address 

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



WANTED— Information concerning the most sat- 

 isfactory and recent formulas used in making 

 matches. Address M. T. B., Box 9, Gettysburg, Pa. 



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 

 Eaven, Conn. 



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. 



WANTED — A position in a college to teach Geol- 

 ogy, Mineralogy, and Physical Geography by 

 a graduate of a scientific institution and a teacher 

 of experience. Address Box 13, Nantasket, Mass. 



Exchanges. 



[Freeof charge to all, if of satisfactory character. 



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



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

 with lens, holders and tnpod, all new; it coi^t over S40; 

 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 Winchell. No 

 books wanted except latest editions, anH 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 (zoog. to i-iom^ ), platinum dishes and crucibles, 

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

 part or whole. Also complete file of SiUi7nan''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. Bullock stand; monocular objecrives, 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 Smith, 41 Branch Street, Lowell, 

 Mass. 



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 cryplogamic botany — mostly on Fttngi; thir- 

 vols. of Botanical Gazette, eight vols. Grevillea, 



th attach- 

 con slide: 



four vols. Notarisea; stereopticon outfit, w 

 ment for microsccpic projection ; 148 stereoptic( 

 illustrating zoology and cryptogams. Wanted — i 

 and foreign works and pamphlets on Vertebrate Palse 

 tology. and series ni A7}t. Jour, of Scie7ice and other p 

 odicals containing contributions to Vertebrate Palse 

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



BOOKS: MOTT to Sell tbein. Send a list 

 stating condition, edition, etc., to Science Book 

 Agency, 874 Broadway, New York. 



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. 



Vile cod-liver oil has lost 

 its vileness in Scott's Emul- 

 sion and gained a good deal 

 in efficiency. 



It is broken up into tiny 

 drops which are covered with 

 glycerine, just as quinine in 

 pills is coated with sugar 

 or gelatine. You do not get 

 the taste at all. 



The hypophosphites of 

 lime and soda add their tonic 

 effect to that of the half-di- 

 gested cod -liver oil. 



Let us send you a book on 

 CAREFUL LIVING — free. 



Scott & Bownb, Chemists, ija South 5th Avenue,. 

 New York. 



^ Your druggist keeps SoDtt's Ei^ulsion of cod-ltver 

 oU*^l druggists everywhere do, (x. 



■3 



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 dictionary form, comprising about 150 

 titles (with 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 centi^ but ought to- 

 save at least that amount every other day, directly 

 or indirectly."— C/i/cago Standard. 



"Likely to be of great and constant service to all 

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

 pages contain a great amount of information, very 

 well arranged, knowledge of which should prevent 

 most of the delays and losses 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 Some 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.'"— Hon. Thomas L. James, ex-Post- 

 master General. 



Price, 15 Cents, Postpaid. 



ADDRESS N, D. C. HODGES^ 



874 Broadivay, Ne«r York. 



ESTERBROOK'S 

 STEEL PENS. 



Of SUPERIOR AND STANDARD QUALITY. 

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



For Sale by all Stationers, 



THE ESTERBROOK STEEL PEN GO., 



Works: Oamden, N. J. 26 John St., New York. 



Ward'sNaturalScienceEstablishment 



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



Send for Circular. ROCHESTER, N. Y. 



minerals, 



Rock§, 



Fossils, 



€asts of Fossils, 



Geological 



Relief maps. 



Stuffed Animals 

 and Skins 



mounted 



Skeletons, 



Anatomical 



models, 



InTertebrates 



