Papers presenteD at tfte Conference 



First Session, Tuesday, October 1 



PAGE 



FACTORS AFFECTING THE SEASONAL AC- 

 TIVITIES OF PLANTS D. T. MacDougal 3 



AIR DRAINAGE AS AFFECTING THE AC- 

 CLIMATIZATION OF PLANTS Ernst A. Bessey. 25 



THE REAL FACTORS IN ACCLIMATIZATION.^. E. Clements.. 37 



EVAPORATION AS A CLIMATIC FACTOR IN- 

 FLUENCING VEGETATION B. E. Livingston . 43 



RESISTANCE TO COLD, HEAT, WET, 

 DROUGHT, SOILS, INSECTS, FUNGI, IN 

 GRAPES T. V : Munson ... 63 



Is ACCLIMATIZATION AN IMPOSSIBILITY?. .JV. E. Hansen... 69 



DEVELOPING HARDY FRUITS FOR THE NORTH 



MISSISSIPPI VALLEY S. B. Green 79 



Second Session, Thursday October 3 



EXPERIMENTS IN PLANT ACCLIMATIZATION 



IN ALASKA W. H. Evans .... 87 



PLANT IMPROVEMENTS NEEDED IN SPECIFIC 



CASES W. M. Hays 97 



PLANTS FROM EAST ASIA AND WESTERN 



EUROPE ON LONG ISLAND H. Hicks 103 



Papers EeaD ft\> Citle 



COOPERATIVE METHODS OF ASCERTAINING 



HARDINESS IN FRUITS H. L. Hutt 113 



FACTORS AFFECTING HARDINESS OF THE 



PEACH U. P. Hedrick ...119 



OBSERVATIONS ON HARDINESS OF PLANTS 

 CULTIVATED AT THE NEW YORK BOTANI- 

 CAL GARDEN Geo. V. Nash ... 129 



OBSERVATIONS IN THE REGION AT THE 



HEAD OF LAKE MICHIGAN Jens Jensen 145 



