852 



SCIENCE 



[N. S. Vol. XXVII. No. 700 



The titles of tlie papers presented at the 

 meeting are given below: 



Presidential address by Professor Mark Jeffer- 

 son, of the State Normal College, Ypsilanti. Sub- 

 ject, " Man in West Norway " ( illustrated ) . 



SECTION OF AGEICUXTUEE 

 (a. C. ANDEBSON, VICE-PEBSIDEISfT ) 



" Some Michigan By-products," by Frank S. 

 Kedzie. 



" Mutual Interaction of Plant Roots," by J. B. 

 Dandeno. 



" Bird Protection and the Farmer," by Walter 

 B. Barrows. 



" The Claims of the Michigan Academy of Sci- 

 ence," by W. J. Beal. 



"The Cost of Weeds to the Crop," by J. A. 

 JeflFery. 



" Studies in Insect Control," by R. H. Pettit. 



" Unsolved Problems in Incubation," by J. G. 

 Halpin. 



" Variations in the Proteid Content of Corn as 

 shown by Analyses of Single Kernels from the 

 Same Ear," by Andrew J. Patten. 



SECTION OF BOTANY 

 (W. E. PEAEGER, VICE-PEESIDENT ) 



" More about the Botanical Terra Incognita in 

 and around Ann Arbor," by S. Alexander, Ann 

 Arbor. 



" Some Interesting Variations of Common 

 Plants," by Chas. A. Davis, Ann Arbor. 



" An Iris New to Michigan," by Chas. A. Davis. 



" Seedlings of Ranunculus Purshii," by Chas. 

 A. Davis. 



" Additional Notes on Chara," by Ellen B. Bach, 

 Ann Arbor. 



" A Botanical Trip to Thunder Bay Island," by 



C. K. Dodge, Port Huron. 



" Temperature Variations in Peat Bogs," by G. 

 P. Burns, Ann Arbor. 



" Problem of the Causes of the Formation of 

 Mechanical Tissues in Plants," by F. C. New- 

 combe, Ann Arbor. 



" Effect of Longitudinal Traction in the Forma- 

 tion of Mechanical Tissue in Stems," by John A. 

 Bordner, Ann Arbor. 



" Response of Tendrils to Traction," by Warren 



D. Bush, Ann Arbor. 



" Effect of Swaying by the Wind on the Forma- 

 tion of Mechanical Tissue," by Maude Gilchrist, 

 Agricultural College. 



" Poisonous Excretions of Roots," by Richard 

 M. Zeeuw, Ann Arbor. 



" Mychorhiza on Michigan Trees," by D. M. 

 Matthews and G. A. Duthie, Ann Arbor. 



" Some Mycorhiza-forming Basidiomyoetes," by 

 L. H. Pennington, Ann Arbor. 



"Can Fusaria assimilate Free Nitrogen?" by 

 L. H. Pennington. 



" Is Brown-rot of Stone Fruits in Michigan due 

 to Sclerotina fructigeiia or S. cinereaf " by J. B. 

 Pollock, Ann Arbor. 



" The Ascus Stage of Sclerotina fructigena," by 

 J. B. Dandeno, Agricultural College. 



" Capillarity of Cellulose," by J. B. Dandeno. 



" Toxic Action of Bordeaux Mixture and of Cer- 

 tain Solutions on Spores of Fungi," by J. B. 

 Dandeno. 



" Unreported Michigan Fungi for 1907, with an 

 Outline of the Gasteromycetes of the State," by 

 C. H. Kauffmann, Ann Arbor. 



" The Development of SecoHum acuminatum 

 Mont.," by C. H. Kauffmann. 



SECTION OF GEOLOGY AND GEOGEAPHY 

 (E. H. KEAUS, VICE-PEESIDENT ) 



" Pleistocene Beaches of Saginaw County," by 

 W. F. Cooper, Lansing. 



"Note on the Intercalated Devonian Bed (An- 

 derson Limestone ) of the Detroit River Region," ' 

 by W. H. Sherzer, Ypsilanti. 



" The Nature, Distribution and Origin of the 

 Sylvania Sandstone," ^ by A. W. Grabau, New 

 York, and W. H. Slierzer, Ypsilanti. 



" The Decomposition of a Boulder in the Calu- 

 met and Heela Conglomerate," by A. C. Lane, 

 Lansing. 



" Some Possible Uses for Peat in Michigan," by 

 C. A. Davis, Ann Arbor. 



" Peat Deposits as Geological Records," by C. 

 A. Davis. 



" On the Discovery of Permian Reptiles in 

 Pennsylvania and the Bearing of this Discovery 

 on the Pennsylvanian-Permian Border-line," by E. 

 C. Case, Ann Arbor. 



" Interpretation of the Chemical Composition 

 of the Mineral Benitoite," by E. H. Kraus, Ann 

 Arbor. 



" Cobalt-nickel-silver Deposits of the Cobalt Dis- 

 trict of Ontario," by R. E. Hore, Ann Arbor. 



" Models for the Practical Solution of Problems 

 in Structural Geology," by W. H. Hobbs, Ann 

 Arbor. 



" A Deduction from the Study of Bridges whict 



■ With the permission of the State Geological 

 Survey. 



