68 SUCCESSFUL FKUIT CULTURE 



Pameuse and Bartlett and Bosc be kept until the main 

 crop is out of the market, a glut could be prevented and 

 much higher prices be obtained. The increased value of 

 Gravenstein and Fameuse apples and Bartlett or Bosc 

 pears is often as much as one dollar to two dollars 

 per box. 



Cold storage houses are constructed on three prin- 

 ciples : (1) Those that are cooled off at night by letting 

 in cold air from the outside and shutting out the hot air 

 during the day. (2) Those cooled by means of ice. 

 (3) Those cooled by chemicals. The first and second of 

 these only are adapted to the use of the small grower. 

 The first method is of little use, except for fall and 

 winter fruit, but after the cold nights of September, if 

 the doors and windows are kept open at night and are 

 closed during the daytime, an even, low temperature 

 may be kept up that will retard the ripening of apples 

 and pears, so as to be of great profit to the grower 

 and that without much expense. The walls of such a 

 building must be made with several air spaces on the 

 sides. The roof and the windows must be of several 

 thicknesses and be made to shut tightly. Such a house 

 can be used in warm weather by having an ice chamber 

 large enough to hold suflicient ice to lower the temper- 

 ature to the required point and then be kept cool by 

 opening only on cold nights. If it is desired to make 

 the temperature very low, ice and salt may be combined 

 to reduce it very quickly. The amount of ice required 

 can only be determined by experiment. 



Many cold storage houses are now in use in which 

 the low temperature is obtained by storing ice in the 

 second story, the cold air dropping down into the space 

 occupied by the fruit. In some of these houses the entire 

 space overhead is filled with ice and in others only a 

 large ice box is constructed in the center of the space 

 overhead. In the former case the atmosphere is likely 



