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XL VII. Observations upon the Glazing of Hot-houses, and 

 Conservatories. By James Robert Gowen, Esq. 



Read October 6, 1818. 



j\ s I do not observe in the Transactions of the Horticul- 

 tural Society, any account of the improved methods of 

 glazing, I have drawn up this Paper in the hope that a 

 more extensive knowledge of their advantages may secure 

 them a general introduction into gardens. In the usual 

 method, each pane of the roof-lights is cut into the form of 

 a parallellogram, and made to lap over the one immediately 

 below it, in a larger or smaller proportion, according to the 

 fancy of the gardener or glazier. The rain being impeded 

 in its progress downwards by the interruption in continuity 

 of the glass, hangs upon the edge of the pane till it is at- 

 tracted by the bar, down the sides of which it runs in a 

 stream, and insinuating itself between the putty and the glass, 

 accelerates the decay of the frames ; and where the slightest 

 defect exists in the putty, penetrates into the house, where it 

 will be found to be the most frequent cause of drip : that 

 arising from the condensed moisture of the interior being 

 comparatively small in quantity. Another serious mischief is 

 occasioned by the broad film of water which collects between 

 the lapping of the panes, and which freezing in severe 

 weather, expands and breaks the glass to so great a degree, 



