256 FOEClNG-HOtrSES FOE VEGETABLES. 



ing the day not above seventy degrees — ranging be- 

 tween these two figures. 



These houses may be built any desired length 

 from one to three hundred feet and from two to eight 

 in width, or connected, as shown in the end view, p. 255. 



Each house is eleven feet wide, with a table on 

 either side and a passage-way twenty inches wide, the 

 floor of which should be six and a half feet clear 

 from the ridge-pole. 



These buildings are heated by hot water, a double 

 row of four-inch pipes, under each table, supported 

 every ten or twelve feet by brick pillars, eighteen 

 inches high, which will bring the pipes within fifteen 

 inches of the tables. 



There are quite a number of these patent heating 

 apparatuses, now in general use, near New York. 

 As far as we have been able to examine them, there 

 is very little difference, either in the expense or in 

 the working of some of these various patents. Of 

 those most popular among gardeners, are Hichings 

 & Go's., C. E. Ellis's, and Weathered and Chesevoy's 

 any one of which will answer the purpose. 



The outside walls should be put up as follows : a 

 post is set every four feet and weather-boarded, then 

 a space on the inside of two inches, and an eight- 

 inch brick wall, on which rests the outside gutter 

 plate. 



The ridge-pole is five inches by two and a half, 

 cut in on either side three-quarters of an inch (as 

 seen on p. 255), to give a bearing for the upper end of 

 #ie sash to rest on. The gutter plates are twelve 

 inches wide, four inches thick, and supported by posts 



