CHAPTER XVIII.
THE FOOD OF MAN.
"This leads me to remark," answered the eyeless seer, "that you speak without due consideration of previous experience. You are, or should be, aware of other and as marked differences in food products of upper earth, induced by climate, soil and cultivation. The potato which, next to wheat, rice, or corn, you know supplies nations of men with starchy food, originated as a wild weed in South America and Mexico, where it yet exists as a small, watery, marble-like tuber, and its nearest kindred, botanically, is still poisonous. The luscious apple reached its present excellence by slow stages from knotty, wild, astringent fruit, to which it again returns when escaped from cultivation. The cucumber is a near cousin of the griping, medicinal cathartic bitter-apple, or colocynth, and occasionally partakes yet of the properties that result from that unfortunate alliance, as too often exemplified to persons who do not peel it deep enough to remove the bitter, cathartic principle that exists near the surface. Oranges, in their wild condition, are bitter, and are used principally as medicinal agents. Asparagus was once a weed, native to the salty edges of the sea, and as this weed has become a food, so it is possible for other wild weeds yet to do. Buckwheat is a weed proper, and not a cereal, and birds have learned that the seeds of many other weeds are even preferable to wheat. The wild parsnip is a poison, and the parsnip of cultivation relapses quickly into its natural condition if allowed to escape and roam again. The root of the tapioca plant contains a volatile poison, and is deadly; but when that same root is properly prepared, it becomes the wholesome food, tapioca. The nut of the African anacardium (cachew nut) contains a nourishing kernel that is eaten as food by the natives, and yet a drop of the juice of the oily shell placed on the skin will blister and produce terrible inflammations; only those expert in the removal of the kernel
