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UNIVERSITY OF CALIFORNIA EXPERIMENT STATION 



in making certain observations on the effectiveness of artificial heating, 

 and their findings are reported in a special article in this bulletin. 



Many growers in various parts of the state, too numerous to 

 mention individually, have also greatly assisted our investigators and 

 have given freely of their time and experience. To these and to all 

 who have aided in the preparation of this report I wish to express the 

 thanks of the institution. 



H. J. WEBBER, 



Director, Citrus Experiment Station. 



Fig. 1. Badly frozen Eureka lemon grove. Leaves still hanging but 

 drying out. Photographed by Smith, March 7, 1913. (See same grove 

 later in fig. 2.) 



