24 THE CULTURE OF THE GRAPE. 



ed to bear ten to fifteen bunches each, the outside ones 

 twenty to thirty. 



GLASS HOirSES HOW CONSTEUCTED. 



Glass houses, for horticultural purposes, may be con- 

 structed in a great variety of forms, to suit the particular 

 circumstances of the place, or ground where it is to be 

 located. 



It is important to have as little obstruction to the admis- 

 sion of light, and as little solid wood work, as is consistent 

 with a proper degree of strength in the frame and sashes 

 which are to support the glass, as possible. It is also im- 

 portant, in frigid climates, to guard against tlie admission 

 of cold, or the escape of heat; consequently, the ends 

 and the back, or the north side of the house, are usually 

 built of wood, stone, or brick. Oiled paper and cloth, 

 and other preparations on cloth, have been used for cover- 

 ing the roof, but with no good result; glass is the only 

 article that can be used to advantage. To admit air, 

 which is essential to the flavor of the fruit, and the well- 

 being of the plant, the front lights, or windows, as also 

 the upper part of the roof-sashes, are made to open out, 

 or to run on rollers. 



The curvilinear roof is approved by many. The fol- 

 lowing description of some houses of my own, which 

 answer the purpose for which they were constructed 

 perfectly well, and the manner of building them, toge- 

 ther with the cost, accompanied with a view of these, is 

 deemed sufficient for this treatise. 



