2135. The advantages which this mode of heating has over steam are, that as soon as heat is conveyed by the fire to the water, a circulation takes place in the apparatus, by which means heat is immediately communicated to the house, or body to be heated; whereas, in heating by steam, none can be communicated till after the water has been made to boil. A second advantage which hot water has over steam, is that of producing a mass of heated matter, which parts with its heat slowly; whereas, from the gasiform nature of steam, unless it is employed to heat other bodies to its own temperature (as in the mode of its application to stones, &c., already described, ﾺ 2125.), it leaves no supply of heat after it has been withdrawn.
