ROSE-FORCING IN AMERICA. 



466 



wood and the iron tubing carries off the condensation to the water-table. 

 When the house was being built the question arose as to whether the 

 iron bars would hold the cold, and make the house freeze over ; but Mr. 

 Pierson says that, on the contrary, the iron seemed to hold the heat 

 from within, and start the snow and ice after a heavy storm, so that the 

 roof on this house was always the first cleared. 



The following ([notation from a letter of the Floral Exchange, speaks 



Fig. 133. — Intkkiok of TBI Mammoth HOUSE of TBI FLORAL Exchanok 

 at Epobly, Philadelphia. 



for itself and gives another point of view, from people who have had 

 splendid success with large houses : — " We find that our wide house, 54 ft. 

 by 300 ft., has been the most profitable on the place, both as to number 

 and quality of flowers and ease of working it. The past winter has given 

 it a very severe test, and the few weak points we found will be avoided in 

 the house we are now building, which will be still wider than the one put 

 up last year. This house will be 08 ft. 2 in. wide on the square section, 

 but the ends being cut off i bias ' will measure 89 ft. In this house we do 



n 



