30 BULLETIIT 821, U. S. DEPAKTMEITT OF AGRICULTUKE. 
Nonheated orchards which had received good care prior to the 
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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