FRT'IT STORAGE 



135 



dampers, by means of which the flow of air from tlie 

 cellar is controlled. With the 150-foot flue used in 

 this cellar it has been found that when the mercury 

 remains below 20° for any length of time, the cellar 

 will take a temperature below freezing unless the ven- 

 tilators are closed. 



Fig. 43 show^s the ground plan of the cellar. The 

 letters so far as used always indicate the same part of 

 the structure in the section. The walls are constructed 

 of stone, which is unquestionably the proper material. 



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FIi;. 43 — CELLAR PLAN OK HOUSE SHOWN IN FIG. 42 



In the Virginia building, which was constructed to 

 test the practicability of an idea new to this class of 

 structures, expense was avoided so far as possible, and 

 the walls were built of wood. The framing of the 

 walls is constructed of 2 x 4 scantling, framed into 

 sills laid in broken stone and cement. The corner 

 posts are 4x4 scantling. This frame is covered out- 

 side by a double sheathing of inch oak plank. The 

 first course was put on, diagonalh' and covered with 

 .strong builder's paper, and over this a perpendicular 

 course of .sheathing was put on. The whole structure 

 was then literally soaked with crude petroleum, and 

 the earth rammed in tight around the cellar story and 



