Pearl, Raymond. Modes of Research in Genetics; Review 243 



Permeability and Antagonism. W. J. \. Osterhout; Review 78 



Physiological Balance in Nutrient Media. J. W. Shive; Review. . 169 



Physiological Vigor. H. M. Benedict; Review 114 



Piper, C. v., and Beattie, R. K. Flora of tlie Northwest Coast; 



Review 171 



Plant Successions in the Mount Robson Region, British Columbia. 



W. S. Cooper 211 



Pool, R. J. Behavior of an Excised Branch of the Sahuaro 17 



Proceedings of the National Academy; Note 117 



Professional Advancement Colmnn; Note 329 



Raitt, Anna H. Development of the Ovule of Impatiens pallida 195 

 Ramaley, Francis. Dry Grassland of a High Mountain Park in 



Northern Colorado 249 



Red Color of the Mesocarp of Seeded Fruits in the Persimmon. 



F. E. Lloyd 106 



Report of the Selby Smelter Commission; Review 23 



Response in Dionaea and Drosera. W. H. Brown, H. D. Hooker, 



. Jr. ; Review 204 



Revegetation of Range Lands. A. W. Sampson; Review. 167 



Revision of Rhipsalis. Alberto Lofgren; Review 282 



Rigg, G. B. Smnmary of Bog Theories : 310 



Romer, Caroline S. Work of; Note 285 



Russel, E. J. Soil Conditions and Plant Growth; Note 150 



Sampson, A. W. Revegetation of Range Lands; Review 167 



Schmitz, Henry. Observations on Witches Brooms of Cherries.... 239 



Selby Smelter Commission ; Review 23 



Selective Permeability and the Plasma Membrane. J. Davidson 331. 



Sheldon, S. M. Work on Nereocystis; Review 48 



Shive, J. W. Physiological Balance in Nutrient Media; Review. . 169 

 Shreve, Forrest. Weight of Physical Factors in the Study of 



Plant Distribution 53 



Skinner, J. J. Effect of Vanillin and Salicylic Aldehyde in Cul- 

 ture Solution , 371 



Soil Science; Note 173 



Spoehr, H. A. Theories of Photosynthesis in the Light of Some 



New Facts 1 



Stanford Arboretmn; Note 284 



Stevens, F. L. Work on Meliola 330 



Study of the Development of Dumontia filijormis. Grace A. 



Dunn 271 



Study of the Relation of Soil Moisture to Transpu-ation and 



Photosynthesis in the Corn Plant. T. G. Yuncker 151 



Simmiary of Bog Theories. G. B. Rigg 310 



Temperature and Rate of Growth. I. Leitch; Review 147 



Theories of Photosynthesis in the Light of Some New Facts. 



H. A. Spoehr..'. 1 



Tottingham, W. E. Balance in Nutrient Media; Review 145 



Tottingham, W. E., and Beck, A. J. Antagonism between 



Manganese and Iron in the Growth of Wheat 359 



