328 



SCIENCE 



[N. S. Vol. LI. No. 1317 



The formation of clay ialds in arid lands: Dk. W. 

 H. Haas, Northwestern University, Evanston. 



The intercision of Pike Biver near Kenosha, Wis.: 

 John E. Ball, Northwestern University, Evans- 

 ton. 



The effect of sewage and other pollution on animal 

 life of rivers and streams: De. Prank Collins 

 Bakee, curator of Natural History Museum, Uni- 

 versity of Illinois, Urbana. 



A possible interpretation of the synchronous flasli- 

 ing of fireflies: De. CHRiSTLiN A. Ruckmick, 

 University of Illinois, Urbana. 



Animal physiological life histories and modern 

 methods of representing climate: Dr. V. E. 

 Shelford, Natural History Survey, University 

 of Illuiois, Urbana. 



Sexual dimorphism in the Acanthocephala : Dr. H. 

 J. Van Cleave, University of Illinois, Urbana. 



Notes on the life history of the Crane-fly of the 

 genus Geranomyia Haliday: C. P. Alexander, 

 University of Illinois, Urbana. 



A review of the species of water mites: Dk. Kuth 

 Marshall, Lane Technical High School, Chi- 

 cago. 



The morphology of the antoriital process in the 

 Urodeles: Geo. W. Higgins, University of Illi- 

 nois, Urbana. 



Some controlling factors in the use of fungous dis- 

 eases in oomiatting insect pests: Dr. B. D. 

 Glasgow and C. S. Spooner, University of Illi- 

 nois, Urbana. 



A comparison of soil temperature in up-land aaid 

 lottom-land forests: Dr. "W. B. McDougall, Uni- 

 versity of Illinois, Urbana. 



An effect of topography and exposure on plant dis- 

 tribution: Dr. H. S. Pepoon, Lake View High 

 School, Chicago. 



Topographic relief as a factor in plant succession: 

 Dr. Geo. D. Fuller, University of Chicago, Chi- 

 cago. 



On the plant ecology of Ogle County, Illinois: H. 

 DE Forest, introduced by Dr. Geo. D. Fuller, 

 University of Chicago, Chicago. 



A note on tlw distribution of oaks in LaSalle 

 County: Dr. Geo. D. Fuller, University of Chi- 

 cago. 



Preserves for ecological study. (The work of the 

 Ecological Society of America's committee) : 

 Dr. V. E. Shelford, University of Illinois, Ur- 

 bana. 



Distribution of oaks on Lake Chicago beaches in 

 Evanston and New Trier Townships: Dr. W. G. 

 Waterman, Northwestern University, Evanston. 



Forest distribution in northern Evanston and 

 southeastern New Trier Townships: Lilllan 

 Margarite Simmons, Northwestern University, 

 Evanston. (Introduced by Dr. W. G. Water- 

 man.) 



A probable cause of foot rot of wheat: Dr. F. L. 

 Stevens and E. Dungan, University of Illinois, 

 Urbana. 



The sooty blotch of pome fruits: A. C. Colby, 

 University of Illinois, Urbana. 



The genus Septoria, presented in tabulation, with 

 discussion: Philip Garman and Dr. F. L. 

 Stevens, University of Illinois, Urbana. 



Forest types and forest associations : (a) From the 

 ecologist 's point of view : Dr. Henry C. Cowles, 

 University of Chicago, Chicago. (6) From the 

 forester's point of view: E. B. Miller, state for- 

 ester of Illinois, Urbana. General discussion, by 

 Dr. Geo. D. Fuller and Dr. A. G. Vestal. 



The cause of increased oxidation in the fertilized 

 egg: Dr. W. E. Bukge, University of Illinois, 

 Urbana. 



Notes on the life history of Psithyrus, an inquiline 

 in the nests of Bumblebees: Theodore H. Pri- 

 son, University of Illinois, Urbana. 



Cnidosporidia in the vicinity of Urbana: Dr. E. 

 Kudo, University of Illinois, Urbana. 



The cultivation of Spirochceta Novyi witlumt the 

 use of tissues from animal organs: 0. H. Beh- 

 RENS, Purdue University, Lafayette, Ind. 



The relation of legibility of the printed page to 

 reading: Madison Bentley, University of Illi- 

 nois, Urbana. 



The cumulative effects of rational increments: 

 Coleman E. Griffith, University of Illinois, Ur- 

 bana. 



J. L. Prioer, 

 Secretary 

 Normal, III. 



SCIENCE 



A Weekly Journal devoted to the Advancement ot 

 Science, publishing the ofScial notices and pro- 

 ceedings of the American Association for 

 the Adveincement of Science 



Published every Friday by 



THE SCIENCE PRESS 



LANCASTER, PA. GARRISON, N. Y., 



NEW YORK, N. Y. 



Entered in the post-office at Lancuter. Pa.* at lecond clait matteir 



