246 UNIVERSITY OF CALIFORNIA EXPERIMENT STATION 



PAGE 



Factors influencing resistance of trees to cold injury.... 



Dormancy of trees 



Time of planting 



Dryness 



Irrigation 



Pruning 



Unhealthy trees 



Influence of trunk section of top- worked trees.... 



Influence of roots or stocks 



Individuality of tree 



Treatment of frozen trees 



Binding loose bark 



Waxing and painting split bark 



Pruning injured trees 



Removing frozen fruit 



Whitewashing exposed trunks 



The renewal of badly injured young trees 



Grafting or budding badly injured trees 



Irrigation to aid recovery of frozen fruit 



Stimulating growth in frozen trees by fertilization. . 



Treatment of wounds on frozen trees 



After effects of the freeze 



Appearance of new growth 



Dying of new growth 



Blooming and fruiting of injured trees 



Planting frosted nursery trees 



Thawing and recovery of frozen fruit 295 



The sale of frozen fruit 



Separation of good fruit from frozen fruit 296 



II. CHANGES THAT TAKE PLACE IN FROZEN ORANGES AND LEMONS 

 BY E. .E. THOMAS, H. D. YOUNG AND C. O. SMITH 



Specific gravity of fruits 



Specific gravity of juice 



Sugar content 



Acid content 



Growth of frozen fruit 



Summary 312 



III. A TEST OF THE EFFICIENCY OF ORCHARD HEATING 



BY A. D. SHAMEL. L. B. SCOTT AND C. S. POMEROY 

 A test of the efficiency of orchard heating 315 



