text:  If therefore our author guided by this illustration of Mr Babbage's proclaims a law of animal life which _changes of itself_ from time to time he is departing from the fundamental principle of all science--he who is so zealous to reduce all phenomenon to the formula of science! Anxious to escape from an abrupt interposition of creative power he introduces a sudden mutability in the laws themselves of nature! If it be said that he does not (although his words imply it) insist upon a single law of nature that varies at intervals but contends for a variable result produced by the law of reproduction acting under varied circumstances and in co-operation with different laws--then was Mr Babbage's machine of no use whatever to him nor did he stand in need of any peculiar illustration