?5o 



SCIENCE. 



[Vol. XVI. No. 4ir 



CALENDAR OF SOCIETIES. 

 Biological Society, Washington. 

 Dec, 13.— William Palmer, The Occur- 

 rence of an Asiatic Cuckoo on the Pribylov 

 Islands: C. V. Riley, New Notes on the 

 Genus Phylloxera; F. W. True, The Teeth 

 of the Muskrat; F. A. Lucas, The Wing of 

 Metopidius. 



Boston Society of Natural History. 

 Dec. 17. — A. E. Dolbear. The Physics of 

 Crystalline and Cellular Structure; T. T. 

 Bouve, Kame Pidges and Hillocks of Hing- 

 ham. 



Wants, 



A 7iy person seeking a position for ivk ich he is quali- 

 fied by his scientific attainvie7tfSy or any person seeking 

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

 of a teacher of science^ chemist^ d-r aught sin an ^ or ivhai 

 not. may have the ' Wajit^ inserted under this head 

 FREE OF COST, if he satisfies the publisher of the stiit- 

 able character of his application. A ny person seeking 

 inforjnation on any scientific question^ fl^ address of 

 any scientific man, or -who can i?z any way use this col- 

 umn for a purpose consonant with the nature of the 

 faper^ is cordially invited to do so. 



WANTED. — A young man wishes a position as in- 

 structor in the sciences in some school or 

 college. Chemistry a specialty. Would like to hear 

 of some position with a private or manufacturing 

 chemist, in which his knowledge of chemistry would 

 help him. Address E. E. TOWNE, B.A., 272 Worth- 

 ington St., Springfield, Mass. 



WANTED.— An Exploring Expedition, backed by 

 ©15,000, will be sent into Alaska and the Brit- 

 ish Northwest Territory the coming year, to be gone 

 one or two seasons. A scientist or two will more 

 than likely be taken along. Applications from such 

 will be gladly received and carefully considered. 

 To assist in making these applications the comman- 

 der would say that he coisiders a full practical 

 knowledge of mineralogy and geology necessary, and 

 if the applicant can add the duties of botanist, eth- 

 nologist, or any other of the sciences, and photog- 

 raphy, sketching, medicine and surgery, or other 

 useful arts for exploring, it will add to the chances 

 of being selected. Applicants must be physically 

 perfect, and ought to be about medium age. One of 

 these scientists will be the second in command of 

 the party. Any credentials forwarded for consider- 

 ation will be returned, if requested, after considera- 

 tion. Address "ALASKA," care of Science. 



WANTED.— There being a considerable annual 

 income for the purchase of books for the Mu- 

 seum Reference Library of Iowa College, it is de- 

 sirable to have at hand any and all circulars, speci- 

 men sheets, catalogues, etc., of all works on Natural 

 History in general, both foreign and domestic. 

 Circulars of museum supplies, apparatus, etc. etc.. 

 desired also. State terms. Address ERWIN H. 

 BARBOUR, Box 1333, Grinnell, Iowa. 



WANTED.— A situation as Analytical Chemist is 

 desired by the assistant of the late noted 

 scientist. Dr. Cook, during his 15 years survey of the 

 State of New Jersey. Highest testimonials fur 

 nished. Address Prof. EDWIN H. BOGARDUS, 

 New Brunswick, P, O. Box 224, care Prof. F. C. 

 Van Dyck. " 



COULD some one inform me what the ingredients 

 and origin of asphalt as used for street-paving 

 and gathered at Trinidad are? Also how gathered 

 and shipped by natives, and mode of refining by the 

 Warren-Scharf Co. of New York and the Barber Co. 

 of Washin^OD? G. KNIPEK, 28 Gunn Block, Grand 

 Rapids, Mich. 



Exchanges. 

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



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

 York.l 



I wish to exchange Eastern Lepidoptera for those that 

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

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



To exchange, 1890 Seeger and Guernsey Cyclopedia, 

 containine 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- 



For exchange— Nice specimens of Unios alatus, trigo- 

 nus, parvus, occidens, anadontoides gibbosus, rectus,veru- 

 cosus, gracilis coccineus, ventricasus, multiplicatus and 

 plicatus cornutus. Margaritana confrogosa, complanata, 

 rugosa, Anadonta edentula. decora, corpulenta, and 

 about 300 of the beautiful Ana- suborbiculaia. Wanted: 

 Unios Irom all parts of the world, and sea-shells. Ad- 

 dress Dr. W. S. Strode, Bernadotte, 111. 



BOOKS : IIo\p to Excbange tbem for 

 otbers. Send a postal to the Science exchange 

 column (insertion free), stating briefly what you 

 want to exchange. Science, 47 Lafayette Place 

 New York. 



JUST PUBLISHED. 

 HOUSEHOLD HYGIENE. 



By Mary Taylok Bissei.l, M.D., New York. 

 12°. 75 cents. 

 "This little volume has been compiled with the 

 hope that the housekeeper of to-day may find in 

 its pages a few definite and simple suggestions 

 regarding sanitary house-building and house- 

 keeping which will aid her to maintain in her 

 own domain that high degree of intelligert 

 hygiene in whose enforcement lies the physical 

 promise of family life " (author's preface). 



TIME RELATIONS OF MEN- 

 TAL PHENOMENA. 



By Joseph Jastrow, Professor of Psychol- 

 ogy AT THE University of Wisconsin. 



12°. 50 cents. 

 It is only within very recent years that this 

 department of research has been cultivated; and 

 it is natural that the results of diiTerent workers, 

 involving variations in method and design, 

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 these it seems possible to present a systematic 

 sketch of what has been done, with due reference 

 to the ultimate goal as well as to the many gaps 

 still to be filled. 



HODGES, 47 Lafayette Place, 



NEW YORK. 



N. D. C. 



PROTOPLASM AND LIFE. 



By C. F. COX. 12^ 



" To be commended to those who are not special 

 ists. "—C/(Wsfmn Union. 



"Physicians will enjoy their reading, and find in 

 them much food for thought." — St. Louis Medical 

 and Surgical Journal. 



"Mr. Cos reviews the history of his subject with 

 knowledge and skill."— Ope?i. Court. 



" It is of extreme interest.'''— Medical Age. 



" Worthy of a careful perusal."— indmna Medical 



Jou 



We have never read an abler essay on the sub- 

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" An interesting and popular account of the ten- 

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 Science News. 



"All interested in biological questions will find 

 the book fascinating ^''— Pharmaceutical Era. 



■' The author displays a very comprehensive grasp 

 of his subject." — Public Opinion. 



"Deserves the attention of students of natural 

 science." — Critic. 



Price, postpaid, 75 cents. 



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



"The Comer 



Longfellow. 



Intone of a IVation." — 



PLYMOUTH ROCK. 



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Would you do this in picture and story, send for 

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9.ictl« Pils-i-ims at Plymontli.— By L. B. 

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PiTnioutli Rock Pappr fl^ig'bta 



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Pboio^rapbH of Plynioutb Stock, 

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Any of the above books will make handsome- 

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"We have sent samples to the editor of this paper 

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Ag-ents wanted. 



-A.. S. BXTRB-A-KTIi, 

 Pilgrim Bookstore, Plymouth, Mass. 



OFWHAT USE IS THAT PLANT? 



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SMITH'S "DICTIONARY OF 

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Sent postaid on receipt of $2.80. Publish- 

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