14 



SCIENCE. 



[Vol. XVII. No. 413 



CALENDAR OF SOCIETIES. 

 Biological Society, Washington. 

 Dec. 27. — Cooper Curtice, A Preliminary 

 Study of Ticks in the United States; C. Hart 

 Merriam, Exhibition of a New Eabbit from 

 the Snake Plains of Idaho; W. H. Dall, On 

 the Topography of Florida with Reference 

 to its Bearing on Fossil Faunas ; F. A.Lucas, 

 Exhibition of Young Hoatzins. 



Wants, 



Any person seeking a position for which he is quali- 

 fied by his scie^ztific attainjnenfs^ or any person seeking 

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

 of a teacher o/science^ cheniisty dratightsnian^ or -what 

 not. 7nay have the ' Wanf inserted under this head 

 FREE OF COST, if he satisfies ike publisher of the suit- 

 able character of his application. A ny person seeking 

 information on any scientific question^ the address of 

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

 uj}in for a purpose consonant with the nature of the 

 paper ^ is cordially invited to do so. 



A UNIVERSITY GRADUATE IN SCIENCE, at 

 present a junior student in medicine at the Uni- 

 versity of Michigan, desires a position as teacher or 

 laboratory assistant. Special preparation in Zool- 

 ogy. Histology, Physiology and Human Anatomy. 

 Will also teach, if desired, Physics, Chemistry, Bot- 

 any, Entomology, Embryology, Bacteriology and 

 Sanitary Science. References and full particulars 

 on application. H. B., 20 East Jefferson St., Ann 

 Arbor, Mich. 



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 bim. Address E. E. TOWNE, B.A., 272 Worth- 

 ingtou St., Springfield, Mass. 



WANTED.— An Exploring Expedition, backed by 

 i$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- 

 rapty, 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, Bos 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. 

 Vao 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 Washington? G. KNIPER, 28 Gunn Block, Grand 

 Rapids, Mich. 



Exchanges. 



[Freeofcharge to all, if of satisfactory character. 

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

 York.l 



I wish to exchange Eastern Lepidopiera for thoi;e that 

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

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



To exchange, 1890 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 P. Lewis, Saybrook, III. 



For exchange— Nice specinjens of Unios alatus, trigo- 

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

 cosus, gracilis coccineus, ventricasus. multiphcatus and 

 plicatus cornutus. Margaritana confrogosa, complanata, 

 rugosa. Anadonta edentula, decora, corpulenta, and 

 about 300 of the beautiful Ana. suborbiculata. Wanted: 

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

 dress Dr. W. S. Strode, Bemadotte, III. 



JUST F^UBLISnED. 



HOUSEHOLD HYGIENE. 



By Mary Taylor Bissell, M.D., New York. 

 12°. 75 cents. 

 "This little volume has been compiled .vith 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 intelligent 

 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- 

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12^. 50 cents. 

 It is only within very recent years that this 

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 sketch of what has been done, with due reference 

 to the ultimate goal as well as to the many gaps 

 still to be filled. 



47 Lafayette Place, 



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'* An interesting and popular account of the ten- 

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"All interested in biological questions will find 

 the book fa.sciaating.''^— Pharmaceutical Era. 



■• The author displays a very comprehensive grasp 

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Price, postpaid, 75 cents, 



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



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