23 



*69. An Illustration of Boyle's Law, 5ua F. M. Andrews 



'■'TO. Some Monstrosities in Trillium, 5m F. M. Andrems 



*71. A Natural Proof that the Root Tip Alone is Sensitive to the Gravita- 

 tion Stimulus, 5m F. M. Andrews 



72. Plasinodesmen, 5m F. M. Andrews 



■*ll. Effect of Alkaloids on Vegetable Protoplasm, 5m F. M. Andrews 



*74. An Occurrence of Kirtland's Warbler, 3m Loren C. Petry 



*75. Nitrifying Bacteria, 10m A. J. Bigney 



*76. A New Form of Microtome Knife, 10m E. G. Martin 



77. Oxygen Absorption in Heart Tissue— A Preliminary Communication, 10m. E. G. Martin 



*78. The Present Status of the Chromosome Controversy, 15m D. M. Mottier 



*79. The Blooming of Cercis Canadensis in September, 5m D. M. Mottier 



•'80. A Peculiar Monstrosity in a Seedling of a Zea Mays, 5m D. M. Mottier 



81. Spore-Like Bodies in Oscillaria sp., 10m Severance Burrage 



82. The Oaks of Indiana, 15m Stanley Coulter 



"83. The Leesburg Swamp, 10m Will Scott 



84. Notes on the Crayfish of Wells County, Indiana, 5m E. B. Williamson 



*85. Note on the Recurrence of Brood V Walter L. Hahn 



'Papers marked with an asterisk appear in the following pages. 



