SCIENCE. 



[Vol. XVII. No. 435 



BUSINESS OPPORTUNITY. 



There is a good chance for the right man 

 as Manager of the 



LIGHTNING PROTECTION COMPANY, 



which is being formed to operate under broad 

 patents. The new method will certainly 

 revolutionize the whole system of protecting 

 property from lightning. 



Those interested should send for report of 

 the meeting of the American Institute of 

 Electrical Engineers, held April 31. 



Local companies are already forming to 

 operate under licenses from the parent com- 

 pany, and we should be glad to hear from 

 any who would care to consider entering this 

 new field. 



The English patent, which has just been 

 received, is for sale. 



Correspondence is solicited with those de 

 siringfurther information. 



N. D. C. HODGES, 47 Lafayette PL, N.Y. 



■pOR SALE.-- 



AN DER SEE. Eeisebriefe aus dem Moore 

 und Ton der Nordsee. Von Dr. Ernst 

 Doges. (1884.) 178 p. 12". 25c. 



DIE KOLONIALREICHE UND KO- 

 LONISATIONSOBJEKTE DER GE- 

 GENWART. Kolonialpolitische und 

 kolonialgeographische Skizzen von Dr. 

 Emil Deckert. Leipzig, 1885. 340 p. 12°. 

 3oc. 



REISEERINNERUNGEN AUS AL- 

 GERIEN UND TUNIS. Von Dr. W. 

 Kobelt. Frankfurt am Main, 1885. Illus- 

 trated. 480 p. 8°. 7oc. 



TRANSMISSION ELECTRIQUE DU 

 TRAVAIL MECANIQUE. Determina- 

 tion des Elements de la Transmission. Par 

 A. Hillairet. Paris, 1884. Illustrated. 

 79 p. 8°. 35c. 



PXE BEZIEHUNGEN ZWISCHEN 

 GEISTESSTORUNG UND VER- 

 BRECHEN. Nach Beobachtungen in der 

 Lrrenanstalt Dalldorf von Dr. W. Sander 

 und Dr. A. Eichter. Berlin, 1886. 404 p. 

 8°. 75c 



BLATTER FUR GEFANGNISS- 

 KUNDE. Organ des Vereins der deuts- 

 cben Strafanstaltsbeamten. Eedigirt von 

 ■Gustav Ekert. Neunzehnter Band, 1 u. 3 

 Heft. Heidelberg, 1884. 151 p. 8". 35c. 



KRITISCHE UND EXPERIMEN- 

 TELLE BEITRAGE ZUR LEHRE 

 VON DER FUTTERUNGSTUBER- 

 CULOSE. Von Dr. F. Wesener. Frei- 

 burg, 1885. 98 p. 8". 35c. 



GEDENKTAGE DER PSYCHIATRIE 

 ALLER LANDER, Von Dr. Heinrich 

 Laehr. Berlin, 1885. 65 p. 8°. 50c. 



ZUR KUNSTLICHEN ERNAHRUNG 

 DER SAUGLINGE IN DEN DREI 

 ERSTEN LEBENSMONATEN. Ex- 

 perimentell plinische Untersuchung von 

 Dr. H. Schoppe. Tiibingen, 1884. 82 p. 

 8". 35c. 



SCIENCE BOOK AGENCY 



47 I^afayette Placej New VorR. 



Wants. 



Any person seeking a position /or which he is guali- 

 fi-ed by his scie7itific attainments^ or any person seeking 

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

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

 not. 7ttay ha-ve the ' JVant^ inserted under this head 

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

 able character of his application. Any person seeking 

 infor7nation on any scientific question^ the address (t/ 

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

 umn for a purpose consonant zvith the nature of the 

 paper ^ zs cordially invited to do so. 



A POLYTECHNIC INSTITUTE GRADUATE, with 

 one year's experience, wants a position as 

 Teacher of Mathematics, Physics, English, and Me- 

 chanical Drawing, or as Assistant in a Mechanical or 

 Engineering Laboratory. For particulars address 

 P. O. Bos 755, Worcester, Mass. 



WANTED— Four additional Teachers for the 

 whole or part of the summer at the Summer 

 School of Languages, Bryant School, Roslyn, L. I., 

 N. Y. One of them at least should be a teacher of 

 conchology and the botany and biology of the ocean, 

 one a geologist, and one a native of France. 



A CHEMIST, who has taken a thorough course in 

 chemistry in one of our best institutions, would 

 like a position as assistant in an iron firm or in any 

 industrial establishment. Correspondence solicited. 

 JOHN N. BARBER, Bos 743, Amherst, Mass. 



AN experienced tutor, Latin, English, German, 

 Science, wishes an engagement in High School 

 or Academy for September commencing. H. L. M., 

 3-43 West 45th Street, New York City. 



A GRADUATE of Yale College, now a medical 

 student, who has made a specialty of the 

 sciences, wishes employment during the summer va- 

 cation, from June 1.5th, to Oct. 1st, GEO. N. LAW- 

 SON, 22 College St., New Haven, Conn. 



11 "''ANTED.— A permanent position that will pay 

 VV S15 per week with prospect of advancement, 

 by a young man (23) and college graduate of one 

 year''s experience. Address J. S. M., care of Science, 

 47 Lafayette Place, New York City. 



WANTED.— Vols. I andll. of Allen^s "Commercial 

 Organic Analysis." Science Book. Agency, 

 47 Lafayette Place, New York. 



THERE is an opening in this office for a college 

 graduate with scientific tastes. Science, 47 

 Lafayette Place, New York. 



WANTED — A situation in an Analytical Labora- 

 tory during the summer vacation. Can give 

 good references. Address M. ADGATE, North Col- 

 lege, Burlington, Vt. 



WANTED— A position in some College, Normal 

 School or Academy to teach Biology, Physiol- 

 ogy, Comparative Anatomy, Histology, Embryology 

 or Botany. A graduate of the University of Wiscon- 

 sin. Have had four years' experience as a teacher. 

 Address "BIOLOGIST," care Science. 



Exchanges. 



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

 Address N. D. C. Hodges, 47 Lafayette Place, New 

 York.l 



For sale, or exchange for geological works, the follow- 

 ing works in anatomy, all latest editions: Allan, Tuain, 

 Gray, Leidy, Massey, and Rollestin's Forms of Animal 

 Life. S. W. WiUiston, Lawrence, Kan. 



Will exchange a new Thomson reflecting astatic gal- 

 vanometer, about 6,000 ohms, made by Clark, Muir- 

 head &Co., London, and costing £30, with i-g, i-gg, 

 1-999, shunts, lampand fscale, for a Weston voltmeter 

 and ammeter, or arge Wheatstone bridge, dial pattern, 

 or a portable testing outfit. Address G. A., Science 

 Office, 47 Lafayette Place, New York. 



For exchange— Fossil leaves from the Laramie beds of 

 SouthTable Mountain, near Golden, Col, for other fos- 

 sils, historical relics, or minerals. Address John E. Gar- 

 vin, State School of Mines, Golden, Col. 



For Sale or Exchange — All forms and species of Cana- 

 dian birds, mammals, insects, reptiles, fish or other nat- 

 ural history specimens. First c!ass specimens only sup- 

 plied. G. E. Atkinson, 639 Spadina Ave., Toronto, Can. 



i would like to exchange first six vols. Roscoe and 

 Schorleminer's Chemistr5^"and Vols. II. and III. of " Ed- 

 ucation " for American Naturalist for i88g and 1890, or 

 works rn Zoology. C. Dwight Marsh, Ripon College, 

 Ripon, Wis. 



A TEMPORARY BINDER 



for Science is now ready, and will be mailed 



postpaid on receipt of 75 cents. 



This binder is strong, durable and 

 elegant, has ^ilt side-title, and al- 

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 fectly flat. Any number can be 

 taken out or replaced without dis- 

 turbing the others, and the papers 

 are not mutilated for subsequent 

 permanent binding. Filed in this 

 binder, Sctenceis always convenient 



Temporary binders of the same 



description but without side title, to 



fit any paper or periodical of ordi- 



ailed postpaid on receipt of price as 



In ordering, be sure to give the name of 



periodical and style of binder. 



12 inches long, cloth, §0.50; leather, $0.60. 



75- 



N. D. C. HODGES. 47 Lafavette Place, New York 



WORLD-ENGLISH. 



25 Cents. 



ANDBOOK OF 

 /^/ WORLD-ENGLISH. 



25 Cents. 



Es ■ President Andrew D. 

 White, of Cornell University, 

 says: "I believe that the highest interests of Chris- 

 tian civilization and. of humanity would be served 

 by its adoption." 



"So set down, our tongue is the best for the world 

 to unite upon." — Brooklyn Eagle, 



'■ The idea of Mr. Bell has much to recommend it, 

 and the presentation is charmingly clear." — Ameri- 

 can^ Phila. 



"The result is a language which cannot fail to 

 meet with acceptance. ■"'-Sost07i Traveller, 



"World English deserves the careful consideration 

 of all serious scholars." — Modern Language Notes. 



Sent, postpaid, on receipt of price. 



N. D. C. HODGES, 47 Lafayette Place, H. Y. 



ANY OF 



Prof. A. MELVILLE BELL'S WORKS 



— ON— 



Elocution -^Visible Speech — 

 Principles of Speech — Faults 

 of Speech — Phonetics — Line 

 Writing — World - English, 

 etc., 



SUPPLIED BY 



N, D. C. HODGES, 47 Lafayette Place, N. Y. 



ROSE POLYTECHNIC INSTITUTE. 



TERUE HACTE, ISDIANA.— A SCHOOL OF ESGISEEKIN);. 



W^U endowed, well equipped departments of t'ivil, 

 Mechanical and Electrical Engineering, Chemistry, 

 Drawing. Extensive Shops and Laboratories. Ex- 

 penses low. For catalogue address H. T. Eddy. Prca. 



J. B. CRALLE & CO., 

 Washington, D. C. 



1LLDSTRA.TED HAND-BOOK FREE upon applica- 

 tion. Mention this paper. 



Iflaiiu scripts prepared for printers; 



Proof-reading.) revising, and all work prepara- 

 tory to publishing, done; 



SlBortliaiid dictations accurately taken; 



Xype-writins correctly, neatly, and tastefully 

 executed, — by one specially trained in the work, 

 and who has had a long practical experience in 

 all kinds of book-work. 



Scientific Work a Specialty. Correspondence 

 solicited . 



Reference: Editor of Science. 



H. A. ANDREWS, care "Science," 



47 Lafayette Place, New York. 



j^Iiuerals^ 



Rocks, 



Fossils, 



Casts of Fossils, 



Creolog^ical 



Relief Maps. 



sNatural 



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



Send for Circular. ROCHESTER, N. Y. 



StuiTed Animals 



and Skiu$, 



Mounted 



Skeletons, 



Anatomical 



lUodels, 



Invertebrates. 



