SCIENCE. 



[Vol. XVII. No. 425 



CALENDAR OF SOCIETIES. 



Anthropological Society, Washington. 



March 17. —R. W. Shufeldt, The Evolu- 

 tion of Home Building among the Navajo 

 Indians; Frank Baker, Platycnemism ; J. 

 "Walter Pewkes, The Zemes of Santo Do- 

 mingo; Z. T. Daniel, Contest of Strength 

 between Indians, Half-Breeds, and Whites. 



Biological Society, Washington. 



March 21. — W. H. Dall, On the Age of 

 the Peace Creek Bone-Beds of Florida ; R. 

 W. Shufeldt, On a Collection of Fossil Birds 

 from the Equus Beds of Oregon; F. A. 

 Lucas, A Point in the Anatomy of Hesper- 

 ornis; F. H. Knowlton, What are Cypress 

 Knees ? H. E. Van Deman, The Recent In- 

 troduction of Date-Palms. 



"p-OB SALE.— 



AN DER SEE. Eeisebriefe aus dem Moore 

 und 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. 

 Emil 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". 25c. 



IE BEZIEHUNGEN ZWISCHEN 

 GEISTESSTORUNG UND VER- 

 BRECHEN. Nach Beobachtungen in der 

 [rrenanstalt Dalldorf von Dr. W. Sander 

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

 S'^. 75c. 



BLATTER FUR GEFANGNISS- 

 KUNDE. Organ des Vereins der deuts- 

 chen Strafanstaltsbeamten. Eedigirt von 

 Gustav Ekert. Neunzehnter Baud, 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. 



ZUR KUNSTLICHEN ERNAHRUNG 

 DER SAUGLINGE IN DEN DREI 

 ERSTEN LEBENSMONATEN. Ex- 

 perimentell plinische Untersuchung von 

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

 8°. 25c. 



GEDENKTAGE DER PSYCHIATRIE 

 ALLER LANDER, Von Dr. Heinrich 

 Laehr. Berlin, 1885. 65 p. 8°. 50c. 



SCIENCE.BOOK AGENCY 



47 I-afayette Place, New York. 



OFWHAT USE IS THAT PLANT? 



You can find the answer in 



SMITH'S "DICTIONARY OF 

 ECONOMIC PLANTS." 



Sent postaid on receipt of $2.80. Publish- 

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SCIENCE BOOK AGENCY, 



47 Lafayette Place, New York 



Wa7tts. 



A 7iy person seeking a Position for which he is qttali- 

 fied by his scientific attainjnen^s, or any person seeking 

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 of a teacher of science^ cheTnist^ draughtsman^ or ivhat 

 not. 7nay have the ' Wa7it^ inserted under this head 

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WANTED.— All of Vol. I. of Journal of Analytical 

 Chemistry, published at Easton, Penn. State 

 price and condition. Science Book Agency, 47 

 Lafayette Place, New York. 



WANTED— A position in a Summer School of 

 Gymnastics to teach any one or more of the 

 following named physical exercises, viz.: Fencing 

 (to ladies especially), Sparring, Club Swinging, 

 Wands, Chest Weights and Free Movements. Am 

 prepared to offer very favorable terms to any school 

 desiring such work. WILLIAM FINDLAY, Propri- 

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 Philadelphia, Pa. 



A COLLEGE GRADUATE— has had four years' 

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 a technical chemist is needed. Address "CHEM- 

 IST," care Science. 



A HARVARD M.A., especially interested in Nat- 

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A CHEMIST, 'taking P. G. work in the Scientific 

 Department of one of our best colleges, would 

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 his knowledge would be of avail. Can furnish best 

 of references. R. S. W.. Box 693, Amherst, Mass. 



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WANTED.— A young man in college would like a 

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WANTED,— A young man who has been teaching 

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WANTED.~A situation in a scientific house by a 

 graduate of the scientific department of the 

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WANTED.— By a medical student of three 

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 tions. W. L. S., Science Office. 



Exchanges. 



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

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

 York.l 



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, 1-99, 

 1-999, shunts, lampand Jscale, 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 

 South Table Mountain, near Golden, Col., for oiher fos- 

 sils, historical relics, or minerals. Address John B. 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 class specimens only sup- 

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



1 would like to exchange first six vols. Roscoe and 

 Schorleminer's Chemistry, and Vols. 11. and III. of '' Ed- 

 ucation " for American Naturalist for 1889 and iSgo, or 

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

 Ripon, Wis. 



I have a good supply of Eastern Coleoptera which I 

 wish to exchange for species not in my collection. Mel- 

 andryidae and Oedemeridae especially desired. Joe C. 

 Thompson, Rosebank P. O., Box 73, S. I. 



I wish to exchange Eastern Lepidaptera iox those that 

 I do not have, particularly those found in the South. 

 Jos. F, Crandall, Honesdale, Wayne Co., Pa. 



To exchange, i8go Seeger and Guernsey Cyclopedia, 

 containing a complete list of the manufactures and pro- 

 ducts of the U. S., and address of first hands, cost $6. 

 David R. Lewis, Saybrook, III. 



W^V^ Enjoy It. 



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Protection from LigMning 



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NEW YORK. 



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