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may be changed and developed --- not that Life may be "created."
The chemical and mineral world furnish us with many instances of the growth and development of forms closely resembling the forms of the vegetable world. What is known as "metallic vegetation," as shown in the "lead tree," gives us an interesting example of this phenomenon. The experiment is performed by placing in a wide-necked bottle a clear acidulated solution of acetate of lead. The bottle is corked, a piece of copper wire being fastened to the cork, from which wire is suspended a piece of zinc, the latter hanging as nearly as possible in the center of the lead solution. When the bottle is corked the copper wire immediately begins to surround itself with a growth of metallic lead resembling fine moss. From this moss spring branches and limbs, which in turn manifest a growth similar to foliage, until at last a miniature bush or tree is formed. Similar "metallic vegetation" may be produced by other metallic solutions.
All of you have noticed how crystals of frost form on window panes in shapes of leaves, branches, foliage, flowers, blossoms, etc. Saltpeter when subjected to the effect of polarized light assumes forms closely resembling the forms of the orchid. Nature is full of these resemblances.
A German scientist recently performed a remarkable experiment with certain metallic salts. He subjected the salts to the action of a galvanic current,
