December 18, 1903.] 



SCIENCE. 



791 



fruits. This seems to be the Celtis canina of 

 Rafinesquc. It is somewhat widely distrib- 

 uted, its range overlapping to some extent that 

 of C. occidentalis, but it always occurs on 

 moister, richer lands and grows to be a much 

 larger tree. 



F. S. Earle, 

 Secretary. 



THE BIOLOGICAL SECTION OF THE ACADEMY OF 

 SCIENCE AND ART OF PITTSBURGH, PA. 



The section held its first regular business 

 meeting, Tuesday, November 3, in the lecture 

 hall of the Carnegie Institute. 



The section was organized on October 9 by 

 a number of members of the academy, who 

 are interested in biological science. The offi- 

 cers of the section are: 



President — George H. Clapp. 

 Vice-President — Professor R. H. Ridgeley. 

 Secretary-Treasurer — Frederic S. Webster. 



President Clapp introduced the speaker of 

 the evening. Dr. A. E. Ortmann, curator of 

 the department of invertebrate zoology of the 

 Carnegie Museum, who addressed the section 

 ' On the Progress of Zoogeographical Investi- 

 gations during the Last Ten Years,' which 

 was followed by a general discussion by mem- 

 bers of the section. 



Regular meetings of the section will be held 

 on the first Tuesday evening of each month. 



Professor J. B. Hatcher, Dr. A. E. Ortmann 

 and Professor Edward Rynearson were ap- 

 pointed as members of the ' Publication Com- 

 mittee.' Frederic S. Webster, 

 Secretary-Treasurer. 



MASS.\CHUSETTS institute OF TECHNOLOGY 

 GEOLOGICAL JOURNAL CLUB. 



The club, which organized in October, 1903, 

 has, during the past month, reviewed the fol- 

 lowing articles: 



R. H. Allen, ' The Oil Fields of the Texas 

 and Louisiana Coastal Plain' (by C. W. Hayes 

 and William Kennedy, in Bull. 212 F. S. 

 G. S.) ; S. Shapira, ' Copper Deposits of New 

 Jersey ' (by W. H. Weed, in Geol. Surv. N. J. 

 An. Rep.. 1902); F. S. Elliot, 'Topographic 



Features of the Yosemite Valley' (by J. C. 

 Branner, in Jour. Geol., September-October, 

 1903) ; E. Burton, ' Earth Movements in the 

 Bay of Naples' (by R. T. Giinther, in Geog. 

 Jour., September, 1903) ; H. W. Shimer, ' The 

 Skull of the Imperial Mammoth ' (National 

 Geog. Mag., October, 1903) ; i[r. Shimer also 

 spoke of other fossil mammoths and of boring 

 clams ; W. G. Ball, ' Mining in the Kirghez 

 Steppes ' {Eng. and Min. Jour., November 14, 

 1903) ; C. E. Danforth, ' Cretaceous Aurifer- 

 ous Conglomerate of the Cottonwood Mining 

 District, California ' (Eng. and Min. Jour., 

 October 31, 1903) ; R. W. Senger, ' Lithia De- 

 posits ' (by W. F. Shaler, in Bull. Univ. Cal., 

 Vol. III., No. 13) ; M. Rubel, ' Notes on the 

 Michipoten Gold Belt' (Eng. and Min. Jour., 

 October 31, 1903) ; G. G. Wald. ' Some Natural 

 Resources of Michigan ' (An. Rep. Mich. Geol. 

 Surv.). 

 The following papers were given : 

 Professor W. O. Crosby, ' The Deflection of 

 the Merrimac River,' also ' A Description of 

 the Formation at the Old Nickel Mine at 

 Dracut, Mass.'; F. G. Clapp (U. S. G. S.), 

 ' Methods of Geological Surveying in Western 

 Pennsylvania'; G. F. Loughlin, 'The Forma- 

 tion at Mine La !Motte.' 



G. F. Loughlin, 

 Secretary. 



ASSOCIATION OF TEACHERS OF MATHEMATICS IN 

 THE MIDDLE ST.\TES AND MARYL.AND. 



On Saturday, November 28, about 300 

 teachers met in the Milbank Memorial Hall, 

 Teachers College, New York City, and organ- 

 ized an Association of Teachers of Mathe- 

 matics in the Middle States and Maryland. 

 Almost all the colleges and large schools 

 within the territory named were represented, 

 and considerably more than 200 persons en- 

 rolled as foundation members of the society, 

 whose prime object is the improvement of 

 mathematical teaching. Professor David 

 Eugene Smith, of Teachers College, was 

 elected president of the association ; Professor 

 H. B. Fine, of Princeton University, vice- 

 president; and Dr. Arthur Schultze, of the 

 High School of Commerce, New York City, 

 secretary. 



