ROSE GROWING IN WINTER. 



159 



Greenhouse Structures); that is, three-quarters of the 

 glass roof slopes to the south at an angle of about thirty 

 degrees, while the other quarter slopes north at an 

 angle of twenty degrees, giving a base space for the 

 benches on which the Eoses are to be planted (taking out 

 the walks), of about fifteen feet. The benches may be 

 either a level platform, or divided into four or five plat- 

 forms about three feet wide, or so as to be at about equal 

 distances from the glass (see end section, Greenhouse 

 Structures) ; the bottom of the benches may be from three, 

 four, or five to six feet from the glass, as desired. 



Fig. 34 shows a perspective view of a Hose house put 

 up for us on Jersey City Heights, N.J., in 1884, by 



Fig. 35. CBOSS-SECTION OF ROSE HOUSE. 



Lord & Burnham. The length is 350 feet by 20 feet 

 in width. It is believed to be as near what the best 

 model of a Rose house should be as has been con- 

 structed. The frame is of iron throughout ; the glass 

 used is double-thick, second quality French, size twenty 

 by twelve, put in the twelve way. The heating is done 

 by steam, the eleven dots indicating the number of one 

 and a quarter inch steam pipes (see cross-section figure 

 35). Although eleven pipes are put in, not more than 

 eight or nine of these are used, unless in extraordinarily 

 severe weather, the others being shut off by valves. The 



