3o8 



SCIENCE. 



[Vol. XVI. No. 408 



DO YOD INTEND TO BDILD? 



The " Atlas of Sensible Low Cost Houses, with Supple- 

 ment " (sent postpaid on receipt of $2) will aid you, no 

 ^ matter what style of house you may intend to build. 



N. D. C HODGES, 



47 Lafayette Place, New York. 



CALENDAR OF SOCIETIES. 



Anthropological Society, Washington. 



Nov. 18. — Otis T. Mason, Natural History 

 of the Arrow; William H. Holmes, The 

 Arrow-Maker as a Mineralogist; DeLancey 

 "W. Gill, Arrow Flaking (illustrated) ; Walter 

 Hugh, Arrow Pointing and Featherirjg 

 (illustrated); Thomas Wilson, Forms of 

 Ancient Arrow-Heads; Weston Flint, Ar- 

 rows in Modern Archery; W. J. Hoffman, 

 Arrow Poisons; J. G. Bourke, Mvthi of the 

 Arrow. 



Philosophical Society, Washington. 

 Nov. 22.— Charles F. Marvin, Wind 

 Pressures and the Measurement of Wind- 

 Velocities; William Hallock. The Coeffi- 

 cient of Expansion of Some Rocks. 



Natural Science Association of Staten 

 Island. 



Nov. 8, Election of Officers. —President, 

 Dr. N. L. Britton; treasurer. Eberhard Fa- 

 ber; recording secretary, Charles F. Simons; 

 corresponding secretary, Arthur Holliok ; 

 curator, Jos. C. Thompson. 



Dr. Britton alluded to his recent proposi- 

 tion (see Bulletin Torrey Botanical Club, 

 vol. xvii. p. 121) to recognize plants which, 

 with greater or less frequency, bear flowers 

 of a color other than the normal hue under 

 the rank of "forms,"' the difference not be- 

 ing sufficient to class them as varieties. Mr. 

 Hollick exhibited specimens of lignite and 

 pyrite from the recently opened 6re-elay 

 beds at Green Ridge. This clay has been 

 mined in this locality to a depth of about 

 thirty feet. It is covered by from six to ten 

 feet of drift, and is undoubtedly of creta- 

 ceous age, the same as the Kreischerville 

 clays, the two no doubt being continuous. 



HANDBOOK OF METEOROLOGICAL TABLES. 



By Asst. Prof. H. A. Hazen. 

 127 pp. 8°. 



A collection of all the tables needed by a 

 working meteorologist. Several of these 

 tables have never been printed before. 



Professor Waldo says : "I heartily recom- 

 mend them to all workers in meteorology, 

 I, and do not see how any of our American 

 meteorologists can afford to be without a 

 copy." 



Professor Symons of London says ; ' ' They 

 are unquestionably valuable helps, which 

 must be kept handy, and replaced when 

 worn out." 



Price, postpaid, $1, 



N. D. C- HODGES, 



47 Lafayette Place, New York. 



Wants, 



A fly person seeking a position J~or "which he is quali- 

 fied by his scientific attain}nen*s^ or any person seeking 

 some one to fill a position of this character,, he it thai 

 of a teacher of science^ chemist^ draughtsman^ or what 

 not, jnay have the ' JVant' inserted under 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 oj 

 any scientific inan^ or who can in any ivay use this col- 

 umn for a purpose consonant with the nature of the 

 paper,, is cordially invited to do so. 



WANTED.— There being a considerable aiiDual 

 income for the purchase of books for the Mu- 

 seura 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. Bos 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 feathered 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. KNIPEK, 28 Gunn Block, Grand 

 Rapids, Mich. 



WANTED.— A position in a Normal School or Col- 

 lege as teacher of Botany, Physiology. Zoolo- 

 gy, Embryology, Chemistry, Physics, or German, by 

 a universitj' graduate who has done special work in 

 the above lines. Several years*' experience in teach- 

 ing, and one year as assistant in Biology in a prom- 

 inent university. Eos 396, Greencastle, Ind. 



PROFESSOR W. M. DAVIS, Harvard College, 

 Cambridjie, Mass., desires to correspond with 

 professional and amateur photographers, from whom 

 he can obtain views of New England landscapes. 



Exchanges, 

 [Freeof 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, panicularly 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 K. Lewis, Saybrook, 111. 



For exchange— Nice specimens of Unios alatus, trigo- 

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

 cosus, gracilis coccineus, ventricasus, multiplicatus and 

 plicatus cornutus. Margaritana confrogosa, complanata, 

 rugosa. Anadonta edentula, decora, corpulenia, 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, Bernadotte. 111. 



Have you a friend who, for fash- 

 ion's sake, submits to physical 

 deformity? Would he or she not 

 be interested in Professor Flow- 

 er*s *' Fashion in Deformity ?" 



Sent postpaid on receipt of 50 cents. 



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