CONSTRUCTION OP HOT-HOUSE ROOFS. 
81 
For several years we used all the ingenuity we possessed in endeavouring to 
make flat wooden roofs as light as possible, on account of their cheapness, and we 
certainly did succeed in making them much lighter than we remember to have seen 
them in any other place ; but as we never mean from this time either to erect flat 
roofs ourselves, or recommend them to be erected by others, it will not be either 
interesting or useful to detail our numerous experiments. 
About three years ago it occurred to us that wooden roofs would admit much 
more light, if the sashes were fixed in angles. We tried a small range of houses on 
this principle, with the sash bars fixed lengthways, the usual way, and rafters to 
bear up the lights. These houses were very light, and the plan appeared to possess 
several advantages, — 1st, more morning and evening sun were received, and at 
an earlier hour than a flat roof-house ; and, 2dly, the violence of the mid-day 
sun was mitigated by the disposition of the angled lights receiving the sun's rays in 
an oblique direction. Subsequent experience has led us to make several more 
alterations, such as doing away with rafters altogether, changing the longitudinal 
positions of the sash-bars, &c, as will be seen in the annexed engravings. We 
shall probably resume the subject next month, and offer some suggestions for 
further improvements ; and shall proceed now to give a 
PLAN AND DESCRIPTION OF A NEW GREEN-HOUSE ERECTED AT CHATSWORTH, 
TOGETHER WITH A SELECTION OF G^RE EN- HOUSE CREEPERS, 
AND REMARKS ON THEIR CULTURE. 
The new green-house at Chatsworth is so constructed that scarcely any more 
light is obstructed than in a metal-roofed house, but it possesses at the same time 
arf the advantages of wood. 
O. JSWITT SC 
Its whole length is ninety-seven and a half feet, and its breadth from the back 
11 ( a ) to the front lights (b) twenty-six feet. 
VOL. II. N0 . IV. M 
