456 The Principles of Fruit-growing. 
at lower ends of ventilating flues indicate position of sliding 
dampers, by means of which the flow of air from the cellar is 
effectually controlled. With the short flue used in the cellar 
here, we find that when the mereury remains below 20° Fahr. for 
any length of time the cellar will be reduced below freezing, 
unless the ventilators are closed. 
“The dimensions of the ground plan of the cellar are shown 
in Fig. 114. The letters so far as used always indicate the 
same part of the structure in the several figures. This figure 
shows the walls to be constructed of stone, which is unquestion- 
ably the proper material. In our building, which was con- 
structed to test the practicability of an idea new to this class of 
structures, expense was avoided so far as possible, and the walls 
are built of wood. The framing of the walls is constructed of 
two by four seantling framed into sills laid in broken stone and 
cement. The corner posts are four by four seantling. This 
frame is covered outside by a double sheathing of inch oak 
plank. The first course was put on diagonal 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 banked up, so as to carry surface 
water away from the walls. Inside the walls were covered with 
ich oak boards, and the bins constructed as indicated in the 
drawings. The entry-way to the cellar is wide enough to admit 
of backing a horse-cart or wagon down into the cellar, so as to 
unload directly from it. This is a matter of much convenience 
te the workmen. The width of the cellar floor will permit of a 
row of barrels being placed in front of the bins and yet admit 
the vehicle. * * ns: * e a 
“A series of observations on the range of temperature in the 
cellar was made during November, December, January and part 
of February, and the results are summarized below. The ven- 
tilator and the supply air flue were all left open from November 
1 to December 10. The outside air temperature registered 28° 
on the morning of the first of November, and the cellar showed 
a temperature of 46° Fahr. As the month progressed, a period 
