“Since the breath yields much more oxygen in winter than in summer, yet can combine with only a fixed amount of carbon, we need to eat more food containing carbon the colder the weather; hence we all notice that our appetite is better in cold weather, and we relish the carbonized food, such as fat, which is four-fifths carbon, as are also butter, honey, various oils, nuts and the like. Hence the Esquimaux can drink gallons of train oil [whale oil] and eat twenty or more pounds of meat per day, and fourteen pounds of candles at a meal without injury; indeed they cannot live without an immense amount of carbon.”