‘298 
On the Glazinif of Hot-houses. 
The same evils which attend the old mode of glazing, as above stated, 
we found to exist under the mode we tried, recommended by Mr. Saul; 
for wherever there was a covering to the joints, wet invariably found its 
way underneath, and the cover preventing the free access of air to dry 
up the moisture, the putty decayed at the upper side of the glass, and 
between the edges of the squares, and also the bedding putty. 
The evils above stated, are entirely prevented in the system we have 
in operation here and elsewhere. The improvement in having a smooth 
surface of glass, does not allow of any attraction for water to lodge under, 
so that the putty or cement we employ, either for bedding the glass with, 
or closing up any openings betwixt the edges of the squares, (these open¬ 
ings are very trifling, as we have the glass cut by a square, so that the 
edges meet quite close up the centre of each rib, and the surface may be 
said to be ohe entirely of glass) is open to dry as early as possible; and 
the putty or cement, is not in the least damaged. 
Mr. Saul states, that if we make use of the same kind of putty as he 
does, it would be liable to crack.—This might be the case; (though we 
feel confident, that if it were properly glazed with any common putty, it 
would not) but with the putty w’e use it never will,—it having a consi¬ 
derable portion of white-lead in it. The cement we make use of for clo¬ 
sing up betwixt the edges of the squares, is not liable to any suspicion 
of cracking or decaying, but will retain its properties co-extensive with 
the duration of the glass itself. 
To prevent the bedding putty being at all injured by wet in the inside 
of the house, arising from steam, or broken squares admitting it, we 
have channels made down the sides of each rib, ha¬ 
ving a considerable slope from the glass, as fig. 38; 
and any water accumulating there, is immediately 
conducted from the putty into the channel, and is 
conveyed away from the bottom of each sash, by the 
sill being sloped off considerably from the glass, and 
falling upon a lead flushing into the spout, or prepa¬ 
red channel. 
We are aware that metallic houses are not liable to the same extent of 
injury, in the putty leaving the framing, &:c, as is the case tn wooden 
houses, but in every other respect we have very great objections to me¬ 
tallic hot-houses. 
In page 185 of the October number, a correspondent predicts that 
when the framing at the sides of a sash gives way, that our mode of gla¬ 
zing will not be as perfect as it was before. We should wonder if it 
was ; but even supposing the framing ever to give way, it would only 
affect the edges of the glass that come in contact with the side-framing, 
and would not in the least affect any other row of panes. The author 
of the prediction, has not informed us what mode of glazing, under si- 
38 
