28 



JIUSUUOCMS, now TO GROW THEM. 



end are given up to entrance pits and a heating appara- 

 tus ; and the full length of the mushroom cellar proper 

 inside the inner walls is sixty-three feet. The walls and 

 arch are of brick, and the top of the arch is two and 

 one-half feet below the surface of the soil. This tunnel 

 or arch is seven feet high in the middle and eight feet 

 wide within, but a raised two-feet-wide pathway along 

 the middle lessens the height to six and one-half feet. 

 Between this pathway and the sides of the building there 

 is only an earthen floor, but it is quite dry, as the cellar 

 is perfectly drained. Three ventilators sixteen feet 

 apart hud been built in the top of the arch, but this was 

 a mistake, as the condensation in the cellar in winter 

 from these veniilators always keeps the place under them 

 cold and wet and rather unproductive. One tall wooden 

 chimney-like shaft would have been a better ventilator 

 than the three ventilating holes now there, which are 

 covered over with an iron and glass grating. 



At one end of the house and behind the stairs descend- 

 ing into the pit is the heating apimratus, from which a 

 four-inch hot-water pipe passes around inside the house 



FIG- 4. Grouxd Plan of the dosoris Cellar. 



near the wall and only four inches above ground. A 

 three-feet wide hemlock flooring for the bed to rest on 

 is laid along each side and about four inches above the 

 pipe, leaving the aperture between the earth floor and 

 the bottom of the bed along the pathway open for the 



