324 



SCIENCE. 



[Vol. XIV. No. 353 



CALENDAR OF SOCIETIES. 

 Biological Society, Washington. 

 Nov. 2. — C. V. Riley, The Remarkable 

 Increase of Vedolia cardinalis in California ; 

 W. H. Dall, Notes on the Genus Gemma' 

 Deshayes ; George Marx, On a New Spider 

 and its Influence on Classification ; C. Hart 

 Merriam, Remarks on the Spotted Skunks 

 (Genus Spilogale), with Descriptions of New 

 Forms. 



Boston Society of Natural History. 



Nov. 6. — Thomas Dwight, The Joints 

 and Muscles of Contortionists. 



Engineers' Club, St. Louis. 

 Oct. 23. — The secretary read a letter 

 from the chairman of the board of managers 

 of the Association of Engineering Societies, 

 proposing a meeting of the board to consider 

 the question of proposed affiliation with the 

 American Society of Civil Engmeers. Pro- 

 fessor Johnson stated that this announce- 

 ment was made for the club's inforrr\ation, 

 in order that an opportunity might be given 

 the club to instruct its members of the board 

 regarding some plan of united action. Mr. 

 H. A. Wheeler then presented some notes 

 regarding the recent European trip of the 

 American engineers. Some three hundred 

 members of the American Society of Civil 

 Engineers, the American Society of Mechan- 



ical Engineers, and the Institute of Mining 

 Engineers, took part. Professor Johnson 

 exhibited a test piece of iron which had been 

 welded by the electrical process at the expo- 

 sition. 



Minnesota Academy of Natural Sciences, 

 Minneapolis. 

 October. — N. H. Winchell, The so-called 

 Huronian Rocks in the Vicinity of Sudbury, 

 Can.; H. V. Winchell, The Iron-bearing 

 Formations of Minnesota ; Professor Cha- 

 ncy, Some Remarkable Forms supposed to 

 be of Cryptozoon in the Shakopee Limestone 

 at Northfield ; Warren Upham, A Recent 

 Visit to Itasca Lake. 



Exchanges. 



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

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

 York.l 



Morris's '* British Butterflies," Morris's " Nests and 

 Eggs of British Birds," Bree's " Birds of Europe " (all 

 colored plates), and other natural history, in exchange 

 for Shakesperiana ; either books, pamphlets, engravings, 

 or cuttings. — J. D. Bamett, Bo.x 73s, Stratford, Canada. 



I have anodonta of alina (Weatherby), and many 

 other species of shells from the noted Koslikonong Lake 

 and vicinity, also from Western New York, and fossils 

 from the Marcellus shale of New York, which I would be 

 glad to exchange for specimens of scientific value of any 

 kind. I would also like to correspond with persons inter- 

 ested In the collection, sale, or exchange of Indian relics. — 

 D. E. Williard, Albion Academy, Albion, Wis. 



Will exchange "Princeton Review" for 1883, "Hugh 

 Miller's works on geology and other scientific works, for 

 back numbers of " The Auk," ''American Naturalist," 

 or other scientific periodicals or books. Write. — J. M. 

 Keck, Chardon, Ohio. 



" I wish to exchange Lepidopte. 



'ith parties in the 

 id western species 

 — P. C. Truman, 



Shells and curiosities for 



Inerals addn 

 Davenport, lo 



i W. F. Lerch, No. 308 East Fourth St., 



COTTS 

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