SCIENCE. 



[Vol. XVIII. No. 444 



By LESTER F. WARD. 

 Annual address of the president of the Biological 

 Society of Washington delivered Jan. 24, 1891. A 

 historical and critical review of modern scientiBc 

 thought relative to heredity, and especially to the 

 problem of the transmission of acquired characters. 

 The following are the several heads involved m the 

 d i scussion 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 Eace. In so far as views 

 are expressed they are in the main in 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. 



Tj-OR SALE.- 



AN DER SEE. Eeisebriefe aus dem Moore 

 unci von 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. 

 Emit Deckert. Leipzig, 1885. 240 p. 12°. 

 25c. 



REISEERINNERUNGEN AUS AL- 

 GERIEN UND TUNIS. Von Dr. W. 

 Kobelt. Frankfurt am Main, 1885. Illus- 

 trated. 480 p. 8". 75c. 



TRANSMISSION ELECTRIQUE DU 

 TRAVAIL MECANIQUE. Determina- 

 tion des Elements de la Transmission. Par 

 A. Hillairet. Paris, 1884. Illustrated. 

 79 p. 8°. 35c. 



PIE BEZIEHUNGEN ZWISCHEN 

 GEISTESSTORUNG UND VER- 

 BRECHEN. Nach Beobachtungen in der 

 Irrenanstalt Dalldorf von Dr. W. Sander 

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

 8°. 75c. 



BLATTER FUR GEFANGNISS- 

 KUNDE. Organ des Vereins der deuts- 

 ehen Strafanstaltsbeamten. Eedigirt von 

 Gustav Ekert. Neunzehnter Band, 1 u. 2 

 Heft. Heidelberg, 1884. 151 p. 8°. 2oc. 



KRITISCHE UND EXPERIMEN- 

 TELLE BEITRAGE ZUR LEHRE 

 VON DER FUTTERUNGSTUBER- 

 CULOSE. Von Dr. F. Wesener. Frei- 

 burg, 1885. 98 p. 8°. 25c. 



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 Untersucbung von 

 Dr. H. Scboppe. Tubingen, 1884. 82 p. 

 8°. 35c. 



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A SCHOOL, in a charmiDg location, needs a lady 

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WANTED— Lyeirs Principles of Geology, second- 

 hand copy, 2 vol. ed., D. Appleton & Co. State 

 condition and price. J. "W. PRELEY, Wells Col- 

 lege, Aurora, N. Y. 



A PROFESSOR, native Frenchman, would accept 

 a situation as companion -tut or in a family 

 spending the summer in the country or abroad . Best 

 pure Parisian accent. Rare opportunity to improve 

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WANTED— Four additional Teachers for the 

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 one a geologist, and one a native of France. 



A CHEMIST, who has taken a thorough ., 

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Exchanges. 



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

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Botanical specimens for exchange. — Special pains have 

 been taken to procure good mountable specimens fit for 

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

 Orwell. Ohio. 



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

 scope outfit. Bullock stand; monocular objectives, one- 

 sixth homeo^eneoi'S 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 Exchange. — A collector of twelve years experience 

 has many fine duplicate minerals which he would like to 

 exchange for others. Address John Holl. Rollo, Wil- 

 mington, Del. 



I would like to exchange some twenty vols, of the Sec- 

 ond Geological Survey of Pa., also a few U. S- Geol. Sur- 

 vey Reports, for State geological reports not in my 

 library. Full particulars to those who offer. J, W. 

 Freley, Wells College, Aurora, N. Y. 



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

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

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

 Life. S. W. Williston, 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 1-9, i-gg, 

 1-99Q, shunts, lampand scale, for a Weston voltmefer 



arge Wheatstone bridge, dial pat 

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

 Office, 47 Lafayette Place, New York. 



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

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Minerals, 

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



Send for Circular. ROCHESTER, N. Y. 



stuffed Auinials 



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