74 VEGETABLE GARDENING. 



where it may receive a little heat from the house. Its limita 

 tions are about the same as those of hotbeds. When such a 

 house is intended for use in winter, it might be an advantage 

 to so plan it that the manure from one-half could be renewed 

 every five or six weeks. 



GREENHOUSES. 



Greenhouse is a term applied rather loosely to glass struo- 

 tuies of the larger sort having special heating apparatus, and 

 used for growing plants. The more expensive structures are 

 not referred to here, but only the simpler ones such as are most 

 economical for use in the market and home garden. 



A Very Cheap, and Yet Withal Serviceable Greenhouse, is 

 described in ''How to Make the Garden Pay" and the publishers 



of it have kindly con- 

 sented to the use of it 

 here. It is called the 

 "Model Forcing Pit." 

 Figure 13 shows a cross 

 section of this house 

 which is made with a 

 valley in the center, so 

 that in point of fact it 

 is two houses. The 

 total width of both houses is twenty-six feet. The alleys are 

 dug into the ground in each house eighteen inches wide and 

 eighteen inches deep and boarded up on each side. The beds 

 on each side are four feet wide, and the attendant can cultivate 

 them when standing in the alley. The peak of the green- 

 house is only four and a half Teet above the ground level or six 

 feet from the bottom of the alleys. The sides are only one foot 

 above the ground, and are made of plank nailed to cedar posts 

 and banked upon the outside with horse manure in winter. 

 The roof is covered with movable sashes 7 or feet long 

 and of any convenient width. Common hotbed sash (3x6 feet) 

 might be made to answer, but sash having larger glass than is 

 generally put in them is best. Large sized glass is preferable, 

 12x16 inches being a good size. A light framework for the 

 sash to rest on, similar in construction to that shown in figure 



igure 31. — Market gardeners' greenhouse. 



