SCIENCE. 



Wants. 



^ ny person seeking a position /or ivkich he is qitali- 

 fi.ed by his scientific attaimfien^s^ or any person seeking 

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

 of a teacher o/ science^ chemist^ draughtsvtan^ or -what 

 not, may have the * Waiif 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 oj 

 any scientific nian^ or ivho can in any way zise thiscol- 

 umn for a purpose consonaitt zvith the nature of the 

 papery is cordially invited to do so. 



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. 



WANTED, Geological Reports of State of New 

 Jersey from 1868 on, except 1880 and 1881. D. T. 

 Marshall, Metuchen, N.J. 



WANTED — A position at a University as Lecturer 

 on Physical Geography or kindred subjects, by 

 a graduate from abroad. First-class references. For 

 particulars address F. A. V., care Science. 



WANTED a position as professor of geology or 

 metallurgy by a school of mines graduate. Ad- 

 dress T. W. O., 49th Street and JVIadison Avenue, 

 New York City. 



A SCHOOL, in a charming location, needs a lady 

 teacher who would teach a portion of each 

 day, five days a week, in return for her home in 

 the institution for a year. The ordinary English 

 branches. (She will be specially acceptable if she 

 has any acconaplishments, as Music, Art, Delsarte 

 System.) MALE SCHOOL, care Science, 47 Lafayette 

 Place, New York. 



AN EDUCATOR of mature years and experience 

 is open to engagement as President of a College 

 or Normal SchooL Address "UNIVERSITY," care 

 Science. 



A PROFESSOR, native Frenchman, would accept 

 a situation as companion-tutor in a family 

 spending the summer in the country or abroad. Best 

 pure Parisian accent. Rare opportunity to improve 

 thoroughly the acquaintance laboriously acquired 

 during the winter. First-class references. Address 

 PROF. GATEAUX, Poughkeepsie, N. Y. 



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, extra hne pair ( S and S ) 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 Fungi: thir- 

 teen vols, of Botanical Gazette^ eight vols. Qrevilleay, 

 four vols. Notarisea; stereoptjcon outfit, with attach- 

 ment for microscopic projection ; 148 stereopticon slides, 

 illustrating zoology and cryptogams. Wanted — American 

 and foreign works and pamphlets on Vertebrate Palseon- 

 tology, and series ai Am. four, of Science and other peri- 

 odicals containing contributions to Vertebrate Paleeon- 

 tology. Prof. F. W. Cragin, Topeka, Kan. 



Botanical specimens for exchange. — Special pains have 

 been taken to procure good raountable specimens fit for 

 any herbarium and no other are oilered. E. E. Bogue, 

 Orwell. Ohio. 



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

 scope outfit. Bullock stand; monocular objectives, one- 

 sixth homeogeneoi'S immersion, four-tenths, and three 

 inch, BauEch & 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 Exchange. — A collector of twelve years experience 

 has many fine duplicate minerals which he would like to 

 exchange for others. Address John HoU. RoUo, Wil- 

 mington, Del. 



I have five vols, of '*01hausen's Biblical Commentary 

 on the New Testament" that I would like to sell or 

 exchange for works on geology of North America. 



These volumes are as good as new, except the slight 

 fading of the black cloth covers. D. T. Marshall, Me- 

 tuchen, N. J. 



NEO-DARWimSM AND NEO-LAMARCKISffl. 



By LESTE-< F. WARD. 



Annual address of the ,. resident of the Biological 

 Society of Washington delivered Jan. 24, 1891. A 

 historical and critical review of modern scientific 

 thought relative to heredity, and especially to the 

 problem of the transmission of acquired characters. 

 The following are the several heads involved in the 

 discussion Status of the Problem. Lamarckism, 

 Darwinism, Acquired Characters, Theories of He- 

 redity, Views of Mr. Galton, Teachings of Professor 

 Weismann, A Critique of Weismann, Neo-Darwin- 

 ism, Neo-Lamarckism, the American "School." Ap- 

 plication to the Human Race. In so far as views 

 are expressed they are in the main m line with the 

 general current of American thought, and opposed 

 to the extreme doctrine of the non-transmissibility 

 of acquired characters. 



Price, postpaid, 25 cents. 



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



POSTAL DICTIONARY. 



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 upon Every Postal Subject which concerns 

 Merchants, Professional Men, Occasional 

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 Sixth edition, revised to date. 

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 titles (with complete index of over 400 references), 

 designed to furnish all facts bearing upon any par- 

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"About as convenient a little book as we have seen 

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HANDBOOK OF 

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



HANDBOOK OF METEOROLOGICAL TABLES. 



By Asst. Prof. H. A. Hazen. 

 127 pp. 8°. 



Professor Waldo says : "I heartily recom- 

 mend them to all workers in meteorology, 

 and do not see how any of our American 

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 copy." 



Professor Symons of London says : ' ' They 

 are unquestionably valuable helps, which 

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Price, postpaid, $1, 



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ESTERBROOK'S 

 STEEL PENS. 



Of SUPERIOR AND STANDARD QUALITY. 

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



For Sale by all Stationers. 



THE ESTERBROQK STEEL PEN CO., 



Works; Oamden, N.J. 26 John St.. NewYoi'h. 



PATENTS 



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BOOKS: How to Sell tliem. Send a list, 

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minerals, 



Rocks, 



Fossils, 



Casts ot Fossils, 



Oeological 



Relief maps. 



Ward'sNaturalScienceEstablishment 



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



Send for Circular. ROCHESTER, N. Y. 



Stiiifed Animals 



and Skins, 



mounted 



Skeletons, 



Anatoinieal 



models, . 



Invertebrates 



