152 Double- Glazing. 



eral months ago, the writer of this set off a small part of his hot-house, 

 and double-glazed it in this way : — 



This illustration shows the arrangement for one sash four feet wide. 

 The original roof is shown by the black lines : the added part may be 

 clearly seen by the dotted lines. Ventilation was provided for by means 

 of a pipe bringing the air from the outside, and letting it into the house 

 just under the hot-water pipes. The quantity of air admitted was regulated 

 by means of a sliding door. 



In this double-glazed house, the plants grew remarkably, — much better, 

 indeed, than was anticipated. During the blustering days of winter, the 

 wind readily found its way here and there through the single-glass roof, 

 but never through the double one. Heated by the same pipes, there was, 

 at times, a difference of nearly ten degrees between the protected and the 

 unprotected part of the house. And, as a further illustration of how well 

 the heat was retained, it may be said, that, after a flurry of snow, the double 

 roof lay cold and white long after all traces of the storm had melted away 

 from the other sashes. 



In the English " Gardener's Chronicle " are many articles in favor of 

 double-glazing. Mr. Rucker's " great fernery and great stove, at Rockville, 

 are the most instructive and beautiful plant-houses in the United Kingdom." 

 The orchids have improved so much during the last five months under the 

 double glass, that, " if sold now, the increase in their value within that time 

 would more than pay for the erection of the house." The writer from 

 whom the quotations are made further says, " Stove-plants, fine-leaved 

 plants, ferns, and palms, display a cleanly vigor, and beauty of growth, which 

 I have never elsewhere seen equalled." 



Many other examples might be given, in which the praises of the system 

 are, if possible, still greater : but the intention is not to write a long article : 

 and enough seems to have been suggested to turn the attention of thought- 

 ful men to the subject of double-glazing. George Such. 



South Amboy, N.J. 



