336 



SCIENCE. 



[Vol. XVI. No. 410 



CALENDAR OF SOCIETIES. 

 Anthropological Society, Washington. 



Dec. 2. — Discussion on Arrows and Ar- 

 row-Makers; Robert Fletcher, Gambling- 

 Sticks from Hupa Valley, Califomia ; Otis 

 T. Mason, The Meeting of the Ameri&an 

 Folk-Lore Society. 



Philosophical Society, Washington. 



Bee. 6. — E. G. Fischer, On Standard 

 Screws and Threads; Gilbert Thompson, 

 An Example of "Work in Barometric Hyp- 

 sometry; B. E. Femow, On the Artificial 

 Production of Rainfall. 



Appalachian Mountain Club, Boston. 



Dec. 10. — Miss M. A. J. Frothingham, 

 From the Gemmi to the Breithorn : H. H. 

 Campbell, A Trip to the ' 'Seven Ponds' ' in 

 Maine (read by Mr. A. E. Scott) . 



Dec. 18 (special meeting). — Charles G. 

 Van Brunt. An Ascent of Sien-a Blanca, 

 Col. 



A 7iy person seeking a position /or -which he is quali- 

 fied i>y his scientijic attainments^ or any person seeking 

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

 of a teacher o/ science^cheinisty d-raaghtsnian, or what 

 noi^ may have the * Want^ inserted itnder 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 of 

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

 umn for a purpose consonant luith the nature of the 

 paper, is cordially invited to do so. 



WANTED.— An Exploring Expedition, Tiaeked by 

 515,000, 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 cot siders 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 oeing 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. 

 BARBOUB, 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 2S4, 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 bv the 

 ■Warren-Soharf Co. of New York and the Barber Co. 

 of Washington? G. KNIPEli,S8 Gunn Block, Grand 

 Rapids, Mich. 



of charge to all, if of satisfactory character. 

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



Exchanges 



[Fre 

 Addres 

 York.l 



I wish to exchange Eastern Lepid"ptera ior those that 

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

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



To exchange, iSqo 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 B. Lewis, Saybrook, 111. 



For exchange— Nice specimens 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 oE the beautiful Ana suborbiculara. Wanted: 

 Uiiio^ Irom all pans nf the world, and sea-shells. Ad- 

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



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