292. Why do charcoal and coke fires burn clearly and without flame?
Because the hydrogen has been previously driven off from those substances.
293. Why is it difficult to light charcoal and coke fires?
Because they contain no hydrogen to produce flame, and assist combustion.
"He hath made his wonderful works to be remembered: the Lord is precious and full of compassion."—Psalm cxl.
A new plan of kindling fires has lately been recommended. Coals are to be laid in the bottom of the fire-place to a considerable depth, then the paper and wood are to be laid on, and then a little coals and cinders over them. This plan of "laying in" the fire is precisely the reverse of that which has been pursued for many years. The theory is, that when the coals in the bottom are ignited, a more even combustion is kept up, whilst the smoke and gas which would otherwise escape, and become as so much waste fuel, is burnt up, and produces heat. We have heard the plan strongly recommended by persons who have tried it, and who testify to the great economy of fuel to which it conduces.