General Considerations. IT 



tend to keep out heat and cold. The roof of the storage 

 room should also have at least one dead-air space. If the 

 storage room is placed beneath the packing room, this is 

 readily accomplished by ceiling or plastering directly on 

 the floor joists; but if the roof of the storage room is also 

 the roof of the building, the roof boards should be laid 

 close, and a layer of lath and plaster may be added just be- 

 neath them and ceiling or lath and plaster may also be 

 added to the lower edge of the rafters. 



The storage room may be kept cool in warm weather by 

 admitting air on cool nights, and ventilators should be 

 provided for this purpose. A ventilator should be placed 

 in the roof for the exit of warm air. On cool nights 

 the ventilators should be opened to change the air. The 

 warm air will pass out through the roof ventilator, and 

 cool air will enter through the lower ventilators. The 

 ventilators should be closed during the warmer hours of 

 the day. 



20. Classification of the different fruits. In treating the 

 culture of different fruits, it is convenient to arrange them 

 into various groups, depending chiefly upon the growth 

 habit and size of the plant, and to a less degree upon bo- 

 tanical characters. To acquaint the student with botani- 

 cal relations, the species belonging to the same genus are 

 generally treated together, and their common characteris- 

 tics, so far as they have a cultural importance, are noted. 



The three principal groups to which the fruits treated 

 are referred are: 



1. The tree fruits, including the fruits grown on trees or 

 the largest shrubs. 



2. The grape. 



3. The small fruits, including those grown on small 

 shrubs or low herbaceous plants. 



