There is no requirement to stay on the true blessings of synthetic light, for they are evident. If we needed to depend entirely on the light of the sun, half the work the world does to-day could not be done.
Probably the earliest kind of artificial light was the fire, lit for heat and cooking purposes. The torch needs to has been originally merely a burning stick taken out of the fire; it was refined when it was discovered that it would burn longer and more brilliantly when dipped in oil or fat. Using fat on the torch might have suggested the rush-light, which consisted just of a rush-stem, or some tow, drifting in a vessel of oil or liquid fat. The Indian chiragh is on just the very same concept. Both the torch and the rush-light were extremely imperfect, the one producing thick clouds of smoke, and the other producing just a really dim light.
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