224 



GATHERING AND PRESERVATION 



Each of the walls is thirteen inches in thickness, made 

 of a kind of mortar or clay formed of clayey earth, 

 straw, and a little marl. This material is preferable 

 to common masonry, because it is a worse conductor 

 of heat, and is besides much cheaper. The walls 

 should be so arranged that the floor of the vacant space 

 between the walls, E, should be on a level with the floor 

 of the fruit-room. 



There are six openings in the walls, three in the 



i/ 



Fig. 185. Plan of Fruitery, following the line Q H, Fig. 184. 



The 



outer and three in the inner, opposite each other, 

 openings form : 



1st. A double door, D, fig. 185 ; the exterior door 

 opens outwards, the interior one inwards, which is 

 also made to fold like a shutter. During the extreme 

 cold the space between the two doors must be packed 

 with straw. 



2nd. Two apertures, E, twenty inches square, placed 

 on each side the fruit-house, and opening three feet 



