a common vegetable Will any one assert that the surrounding inorganic elements of air  earth  heat  and water produce its peculiar form? Though some  or all  of these may be essential to its development  they are so only as its predetermined correlatives  without which its existence could not be manifested  and in like manner must the peculiar form of the vegetable preexist in its life  — in its idea  — in order to evolve by these assimilants its own proper organism