Our knowledge of natural science is, however, founded on experience. Looking at a bear, for instance, for the first time, and with no knowledge of its habits and capacities we would not be apt to believe that the animal could go into retirement at the beginning of winter and remain till spring in a condition of semi-existence and without food. But experience teaches us that the bear when it begins to hibernate is fat; that during hibernation it is in a perfectly quiescent state; that when it emerges into active life again it is emaciated, and that during the whole period of retirement it has taken nothing into its stomach. We then know by observing that all bears go through the same process, that it is a law of their organism to do so, and that their reduced functional actions are maintained by the consumption of the fat with which in the beginning their bodies were loaded. Even here, then, there is no exception to the law that there is no force without the decomposition of matter. Now, it is just possible that by some hitherto unknown or unrecognized condition of the system a man or woman may obtain the force necessary to carry on life for fourteen years without getting it through food taken into the stomach. But a possibility and a fact are two very different things, and the admitted possibility has not yet been shown to be a fact. It is easier--to use the argument of Hume--for the mind to accept the view that there is deception or error somewhere, than to believe that a woman, contrary to all human experience, should live fourteen years without food. Turtles, we know, will live for months while entirely deprived of nutriment. Many others of the cold-blooded animals will do the same thing. It is their nature to do so, and we have experience of the fact, but it is not the nature of women, so far as we know, and therefore we refuse to accept as true the stories which are told of their powers in this direction. And our knowledge is based not only on our daily experience of the wants of their systems and the examples of starvation which have come to our knowledge, but also upon the fact that in the many cases of alleged long abstinence from food that have been investigated, error or deception has been discovered. Therefore, when it is said that Miss Fancher lives without food, and has so done for fourteen years, we simply say, "give us the proofs." Of course the proofs are not given.