Ecology of Roots. J. E. Weaver; Review 344 



Effect of Fertilization on Seed of Jeffrey Pine. E. N. Munns. . . 138 



Enumeratio Systematica Fungorum ; Note 252 



Evidence for a Growth-inhibiting Substance in the Pear Tree. 



H. S. Reed and F. F. Halma. 239 



Flora of the District of Columbia; Note 219 



Flora of the San Antonio Mountains, California. I. M. Johnston, 



71, 105 



Fossil Plants. A. C. Seward; Review 343 



Geologic History of the Sweet Gum and Witch Hazel. E. W. 



Perry 345 



Gericke, W. F. Work on Nutrient solutions; Note 26 



Griffiths, David and Juenemann, H. E. Bulb culture; Note. . . . 275 

 Growth of Conifers. D. R. Brewster; G. A. Pearson; Review. . . 24 

 Hall, H. M. and Goodspeed, T. H. Rubber in Chrysolhamnus; 



Note 276 



Hall, H. M. and Grinnell, Joseph. Life Zone Indicators; Note. . 312 



Harshberger, J. W. Alpine Fell-fields; Note 127 



Hedrick, U. P. Grape growing; Note 148 



Henrioi, Marguerite. Physiological Problems of Photosynthesis; 



Review 123 



Hill, A. F. Penobscot Flora; Note 275 



Improved Colorimeter for Color Inheritance Study. H. F. 



Roberts 262 



Infloresence of Allium. B. W. Wells; Note 251 



Jardine, J. T. and Anderson, M. Grazing in National Forests; 



Note 148 



Johnson, D. S. Proliferation in Cacti; Review 182 



Johnston, E. S. Nutrient Requirement of the Potato Plant. . . . 331 

 Johnston, I. M. Flora of the San Antonio Mountains, Cali- 

 fornia 71, 105 



Kidd, F. and West, C. Conditions affecting potentiality of the 



seed ; Review 363 



Killip, E. P. Ferns of Panama; Note 94 



Korstian, C. F. Native Vegetation as a Criterion of Site 253 



Kraus, E. J. and Kraybill, H. R. Conditions of Fruit-fulness; 



Review 23 



Kunkel, L. 0. Club Root; Review 93 



Life Zone Indicators. H. M. Hall and Joseph Grinnell; Note. . . 312 



Lignum Vitae ; Note 127 



MacDougal, D. T. and Spoehr, H. A. Solution and Fixation in 



Biocolloids and Plant Tissues 129 



McGregor, E. A. Relation of Irrigation to Humidity 45 



Macquarie Island; T. F. Cheeseman; Note.. 184 



Martin, J. N. New Botanical Text-book; Review 217 



Methods in Nutrition Experiments. O. Schreincr and J. J. 



Skinner ; Review 53 



Michigan tree planting; Note 127 



Monograph of the Cactaceac. N. L. Britton and J. N. Rose; 



Review 270 



4 



