On Heating Conservatories, ifc. ivilh Hot Heater. 299 
milar circumstances would remain as perfect as before the framing gave 
way. 
We feel obliged to our cosrespondent, for his suggestion of metallic 
bars, diagonally fixed over the sash, we i eg to inform him we have never 
seen any sashes constructed for hot-houses, &c. but what had metallic 
bars for securing the framing and ribs together, and keeping them in 
^heir proper places. We have for at least twenty years, adopted them ; and 
very probably they have been in use as long as hot-house buildings. But 
we have always had our bars placed crosswise of the sash, and used one, 
two, or more, according to its length. We think the cross-bars will be 
found to effect the desired purpose much better than if fixed diagonally. 
We have every corner of the sash secured by metal plates. We do not, 
as our correspondent directs, fix our bars flush with the surface of the 
ribs, but with the under side of tliem; so that we can get to point the 
upper surface of the bars, when required, — which we could not do with- 
out taking out the glass, in the mode he suggests : to fix them in that 
manner, would obstruct the channels we have down the sides of the ribs. 
We do not, however, expect the framing of any sash glazed on our sys- 
tem, to give way by decay, so early by a very great number of years, as 
in any other mode of glazing we ever, yet saw; our method of having the 
wood kept dry under the glass, secures to us this advantage. 
In reply to a correspondent, who thinks that the appearance of a sash 
does not agree with the representation made in our advertisement upon 
the cover of this Magazine; — v;e beg to state, that it precisely answers 
to what is stated. We did not make use of the term, an even sheet of 
glass, because the overlaps of course prevent it being so. Should he, 
in his extensive and important tours, ever come into Yorkshire, and 
call upon us, we will attempt, by every means in our power, to set him 
right in every thing he desires, relative to glazing hot-houses, &c. 
•J. H. 
Article VII. — On Heatinf/ Coii.sermtories, Sfc uith Hot 
Water. By P. T. O. 
Gentlemex, 
My object not being ostentation, but useful publicity, of a 
cheaper mode of Hot Water Heating than I have seen detailed in any 
publication, I annex the cost of fitting a Conservatory and Forcing- 
Flower House, for insertion in your valuable Magazine, if you consi- 
der it worth publication. 
I have proved the efficiency in economy of fuel, combined with suf- 
ficient heat, in a Vinery fitted last season in the same manner, after 
trials of hot water in the same Vinery upon other principles and other 
