why doesn’t the fire spread into my lamp??

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I’m currently sitting at the kitchen table eating. in front of me is my replica roman lamp that i like to use just because it’s cozy. every time i use it i think the same thing,,, HOW does the fire stay at the tip of the wick?? i understand the oil largely keeps it from burning the wick itself, but still,,, if the vegetable oil is the fuel,,, why doesn’t the fire spread anyway?? shouldn’t it spread down the wick and into the oil container part?? is it because heat rises and the wick is tilted?? would it act different if the lamp held the wick fully horizontally?? and if oiled wicks can’t burn downwards,,, why can matches do it??? is it the constant flow of new oil to the tip??

In: Chemistry