GM: "Founding work of developmental chemical embryology, the first book to report chemical experiments on the developing mammalian embryo, and the first to give practical instructions on dissection of embryos. Needham was also the first to describe the solid bodies in the amniotic fluid, and to give a comparative account of the secondary apparatus of generation." Our copy has 15 pages at the end which agrees with Russell and Krivatsy's collations. However, Norman and Waller both call for 19 pages at end.