338 On growing Mushrooms in Houses. 



the house is built, make a floor or ceiling over it (as high 

 as the top of the outside walls), of boards one inch thick, 

 and plaster it on the upper side, e e, with road sand well 

 wrought together, one inch thick, (this will be found supe- 

 rior to lime), leaving square trunks, f, in the ceiling, nine 

 inches in diameter, up the middle of the house, at six feet 

 distance from each other, with slides, s, under them, to 

 admit and take off air, when necessary ; this being done, 

 erect two single brick walls, v v, each five bricks high, at 

 the distance of five feet and a half from the outside walls, 

 to hold up the sides of the floor-beds, a a, and form one side 

 of the air flues, t u, t u, leaving three feet up the middle, 

 t x t, of the house, for the flues. Upon these walls, v v, lay 

 planks, t v, four inches and a half wide, and three inches 

 thick, in which to mortice the standards, t k, which support 

 the shelves. These standards should be three inches and a 

 half square, and placed four feet six inches asunder, and 

 fastened at the top, k k, through the ceiling. When the 

 standards are set up, fix the cross bearers, i n, i n, that are to 

 support the shelves o o, morticing one end of each into the 

 standards at ?, the other into the walls at n. The first set of 

 bearers should be two feet from the floor, and each suc- 

 ceeding set two feet from that below it. Having thus fixed 

 the uprights, t k, and bearers, i n, at such a height as the 

 building will admit, proceed to form the shelves , o o ,with 

 boards an inch and a half thick, observing to place a board, 

 d d, eight inches broad, and one inch thick, in the front of 

 each shelf, to support the front of the beds. Fasten this 

 board on the outside of the standards, that the width of 

 the beds may not be diminished. The shelves being com- 



