ARTIFICIAL HEAT AND APPARATUS. 41 
To say the best we can of artificial heat, it is only a 
necessary evil, but as we cannot do without using it, we 
ought to put in practice the best and most economical 
method that is at present known. The only advantages 
arising from this necessity, is the raising of the tempera- 
ture of, or drying the atmosphere in any given house 
under care, so as to suit the particular purpose etek 
and so far, by adopting the latest improvements and fore- 
casting as to what is required, we can work along with 
ecoinparative surety. There is no use of entering into a 
theoretical disquisition of the relative properties of caloric, 
nor of showing up the science of chemistry in eombustion. 
our object is to find out how we ean at the least expense, 
and with the more certainty, apply this subtle principle. 
Suffice it then to say that there are about four ways in 
which we can adapt it to our use, viz.: by steam, hot —_ 
brick flue, and what may be —— a modification of 
the latter, the technical term P. 
Steam is of no practical use, a where a large ex- 
tent of houses, all in the immediate vicinity are to be 
heated, neither can it be used with any certainty, unless 
the water is kept up to the point when the steam is given 
off in great quantity, so as to force it through the piper, 
and the heat along with it; besides there is the great dis- 
: of a want of buik of heated substance, which is 
sufficient reason why this mode should not be adopted, for 
on the fire going down, the house immediately becomes 
— 
there is danger at almost any moment in severe weather, 
af injury to, or the loss of a crop. 
Hot Water has of late years become, and most deser 
