Page 3 Advertisements Column 7

New Zealand Herald, Volume XIX, Issue 6281, 4 January 1882, Page 3

Seeing, then, that gas coke is aboni ss good as coal, it may bo asked why it lias not pleased all those who have tried to use it ? The answer is— that the conditions under which it must be burned, if it is to be burned to advantage, are different from the conditions under wliicb coal can be burned to the best profit. If, however, tho very simple requirements of coko aro complied with, it will not only do as well as coal, but sometimes very much better. Thus, for exampl«, where there is not a long run to the chimney—round an oven, for instance—coke will prove more economical than coal. A. very considerable portion of the heat value of coal resides in the gases, which all coal, save, perhaps, anthracite, gives off. These gases when ignited make a long flame, and unless this has room to burn in the flue in contact with the boiler or oven it will burn in tho chimney to waste. But, as regards coke, tho case is different. It gives off much heat in a radiant form directly to th t crcws »/ th« Irepkw*.