30 BULLETIN 821, U. S. DEPAETMENT OF AGRICULTUKE. 



Nonheated orchards whicli had received good care prior to tKe 

 freeze of 1913 and also during that year had returned to normal 

 production by the beginning of 1914, and the heating during the 

 cold period in 1913 had practically no effect on the second season's 

 crop. 



In unprotected orchards, under comparative conditions, a greater 

 amount of injury was found in the Eureka than in the Lisbon variety. 

 The differences were not sufficiently great, however, to warrant the 

 conclusion that there is any considerable difference in the hardiness 

 of the two varieties. Such differences as appeared were entirely due 

 to differences in the habit of growth of the two" varieties, the Lisbon 

 having denser foliage. 



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