Page:The chemical history of a candle.djvu/49

by its own heat; and that is one of the first things you have to consider with respect to the progress of the wax in the course of its combustion, and as regards the changes it undergoes. I will arrange another tube carefully in the flame, and I should not wonder if we were able, by a little care, to get that vapour to pass through the tube to the other extremity, where we will light it, and obtain absolutely the flame of the candle at a place distant from it. Now, look at that. Is not that a very pretty experiment? Fig. 8. Talk about laying on gas—why, we can actually lay on a candle! And you see from this that there are clearly two different kinds of action—one the production of the vapour, and