26 



Table 5. Showing Effect of Condition of Growth on Sap 

 Density and Hardiness of Tomatoes. 



Treatment 



Out of doors.. . . 

 Greenhouse, wet 



Greenhouse, dry 



Out of doors. . . . 



Greenhouse, wet 



Greenhouse, dry 

 Out of doors. . . . 



Greenhouse, wet 

 Greenhouse, dry 



Out of doors. ... 



Greenhouse, wet 



Greenhouse, dry 



Date 



Apr. 29,' 11 

 Apr. 29,' 11 



Apr. 29,' 11 



May 2/11 



May 2,' 11 



May 2,'ll 

 May 4,' 11 



May 4,' 11 

 May 4,'ll 



May 6,'ll 



May 6,' 11 



May 6,' 11 



Tem- 

 pera- 

 ture 



-2 

 -2 



-2 



-2 



-2 



-2 

 -2.S 



-2.5 

 -2.S 



-2.5 



-2.5 



-2.5 



Number 



of 



Plants 



4 

 4 



4 



4 



4 



4 

 4 



4 

 4 



4 



4 



4 



Result of Freezing 



All dead 



Leaves all dead; stems 

 slightly injured 



Uninjured except very 

 young leaves 



All dead (larger and 

 stockier) 



Leaves dead; lower 

 stems alive 



Only few leaves killed 



Foliage and upper one- 

 third stems killed. . . . 



All killed 



Leaves killed; stems un- 

 injured 



Leaves killed; stems un- 

 injured 



Leaves dead; upper one- 

 third stems dead 



. Foliage and growing 

 tips of three plants 

 dead; one plant un 

 injured 



De- 

 pres- 

 sion 



0.73 



0.84 



1.16 



.73 



0.84 

 1.16 



0.73 

 0,84 



1.16 



.73 



0.84 



1.16 



Contrary to what might be expected, those tomato plants grown 

 in the greenhouse but watered sparingly were more hardy than those 

 grown outside; also the depression was greater. The results in this 

 table again indicate that as the depression is lowered, plants are made 

 more hardy. 



Cabbage, kale and turnips were each grown in the greenhouse 

 some watered well and others with water withheld except when it 

 was necessary to keep the plants alive, while others were grown out 

 of doors. The following table give results, and depressions for these 

 plants. 



