Io6 FRUIT HARVESTING, STORING, MARKETING 



3. Cooling by ventilation. — Probably the most prac- 

 ticable, and certainly the most economical, method of 

 storage for farm use and for the ordinary fruit grower 

 is that which depends solely on ventilation for regula- 

 tion of the temperature. At first thought it seems 

 that such means would prove inadequate, but wide 

 experience has shown that, properly managed, a house 

 cooled by ventilation is perfectly satisfactory for fruit 

 storage in any of the northern states. This method 

 grows less and less satisfactorj^, of course, as one 

 moves southward, and I do not believe it is to -be 

 recommended for districts warmer than central New 

 Jersey or central Missouri. It will succeed many 

 times south of that latitude and will fail many times 

 north of there. In the northern states and the prov- 

 inces of Canada this system may be adopted with per- 

 fect confidence. 



The requirements are about as follows : First, 

 thorough insulation against outside changes of tem- 

 perature ; second, adequate ventilation ; third, careful 

 and constant attention, especially when the fruit is 

 first put in, and before. 



Walls are best made in two or three layers, with 

 dead-air spaces between. The typical wall for a stor- 

 age house of this sort is built upon 2x4 studding. On 

 the outside there is laid first a course of good inch 

 boards ; over this is placed one or two layers of build- 

 ing paper, and the wall is finished with a course of 

 tight, well-matched novelty siding. Inside the wall is 

 built in much the same way. There is put on first a 

 layer of inch boards, then one or two layers of paper, 

 and finally the whole is ceiled and heavily painted. 



