In the eighteenth century, two rival theories of organic generation existed. The 'preformationists' believed that all embryos had been formed by God at the Creation and encased within one another to... This description may be from another edition of this product.
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15. ThriftBooks.com. Read more. Spend less.