Apkil 13, 1917] 



SCIENCE 



365 



TABLE III 



Summary showing Relative Effect of Fineness of 

 Division of Pulverised Limestone and CaO on 

 the Decrease {in Per Cent.) of the 

 Original Lime Require- 

 ment of Four Typ- 

 ical Soils 



tion of limestone increasing in fineness of 

 division as shown in Table III. The calcium 

 oxide does not appear to be quite as valuable 

 as the 200-M. limestone, which may possibly 

 be due to the fact that the former proved 

 initially superior in neutralizing the acidity, 

 but allowed a subsequent accumulation of 

 acidity to take place, while the latter neutral- 

 ized the acidity more gradually and in a more 

 progressive manner. 



The writer has experiments in progress 

 which indicate that increasing the fineness of 

 division of pulverized limestone is respon- 

 sible for increasing the biological activities 

 such as ammonification, nitrification and 

 nitrogen-fixation. A study is also being made 

 of the effect of leaching upon the relative 

 efiiciency of different finenesses of division of 

 pulverized limestone, with and without ammo- 

 nium sulphate. This is carried out in galvan- 

 ized iron tanks (containing 130 lbs. of soil) 

 which have stopcocks permitting the collec- 

 tion of drainage water. In a sandy soil the 

 growth of four successive crops indicates that 

 the 60-M. is superior to the 20-M. or the finer 

 grades of limestone, probably because in such 

 deep pots (17 in.) and such a light soil, the 

 finer material is washed down below the root 

 zone. 



Nicholas Kopeloff 



EuTGERs College, 



New Brunswick, N. J., 

 November 3, 1916 



ILLINOIS STATE ACADEMY OF 

 SCIENCE 



The tenth annual meeting of the Illinois State 

 Academy of Science was held at Knox College in. 

 Galesburg on February 23 and 24. About one 

 hundred members and delegates and some two hun- 

 dred citizens of Galesburg attended the various 

 sessions. Over forty new members were elected. 

 Pour sessions were held, as follows: 



Friday afternoon, a general session at which the 

 following papers were read: 



"Safeguarding the Food and Water Supply, a 

 Function of the State," by E. H. S. BaUey. 



"Wireless Transmission of Messages in the 

 Olden Time," by Francis E. Nipher. 



"Botanical Installation in the Field Museum of 

 Natural History," by Chas. F. Millspaugh. 



"The Purpose of Science Teaching in a Univer- 

 sity," by W. A. Noyes. 



' ' Plant Ecology and its relation to Agriculture, ' ' 

 by Warren G. Waterman. 



"Activated Sludge Process of Sewage Treat' 

 ment, " by Edward Bartow. 



"Contribution of the College to High-school 

 Science Teaching," by John C. Hessler. 



On Friday evening, the members of the academy 

 and delegates present and over a hundred citizens 

 of Galesburg enjoyed a banquet at the Galesburg 

 Club. A special session, marking the tenth anni- 

 versary of the academy, immediately followed the 

 dinner. At this session, remarks suitable to the 

 occasion were made by the following delegates 

 from other organizations: Professor F. E. Nipher, 

 St. Louis, American Philosophical Society, Acad- 

 emy of Science of St. Louis; Dr. W. A. Noyes, 

 XJrbana, National Academy of Sciences; Professor 

 J. E. Wells, Beloit, Connecticut Academy of Arts 

 and Sciences; Professor H. S. Conard, GrinueU, 

 Iowa Academy of Science; Professor E. H. S. 

 Bailey, Lawrence, Kansas Academy of Science; 

 Professor W. H. Hobbs, Ann Arbor, Michigan 

 Academy of, Science; Dr. H. S. Pepoon, Chicago, 

 Chicago Academy of Science; Dr. C. W. East, 

 Springfield, Illinois State Board of Health; Dr. P. 

 W. DeWolf, Urbana, Illinois State Geological Sur- 

 vey; Dr. A. E. Crook, Springfield, Illinois State 

 Museum; Mr. E. B. Vliet, Champaign, Chemical 

 Club, University of Illinois; Professor Edward 

 Bartow, Urbana, Illinois State Water Survey; Pro- 

 fessor P. L. Stevens, Urbana, Bacteriological Club, 

 University of Illinois. 



The following had accepted invitations to be 

 present at this program but were unable to be pres- 



