"Taken as a whole, the feather is one of the most perfect products of nature because the material used is the one best thing throughout, the engineering principles involved are without fault, the mathematical plan is precise, the construction is perfect, the coloring and artistry are flawless, and there is not one single point about it that can be constructively criticized. "This short article can only hint at the wonderful things one may find in a single feather, and it is something well worth not an hour, but weeks or months of the most painstaking and careful study, for it covers an amazing field." The electric battery in certain fishes is so palpable a case of design that Charles Darwin admitted his inability to account for it by Natural Selection. The electric ray, or torpedo, for instance, has been provided with a battery which, while it closely resembles, yet in the beauty and compactness of its structure, it greatly exceeds the batteries by which man has now learned to make the laws of electricity subservient to his will. In this battery there are no less than 940 hexagonal columns, like those of a bee's comb, and each of these is subdivided by a series of horizontal plates, which appear to be analogous to the plates of the batteries used in automobiles. The whole is supplied with an enormous amount of nervous matter, four great branches of which are as large as the animal's spinal cord, and these spread out in a multitude of thread-like filaments round the prismatic columns, and finally pass into all the cells. "A complete knowledge of all the mysteries which have been gradually unfolded from the days of Galvani to those of Faraday, and of many others which are still inscrutable to us, is exhibited in this structure." Well may Mr. Darwin say, "It is impossible to conceive by what steps these wondrous organs have been produced. We see the purpose--that a special apparatus should be prepared; but we have not the remotest notion of the means employed. Yet we can see so much as this, that here again, other laws, belonging altogether to another department of nature--laws of organic growth--are made subservient to a very definite and very peculiar purpose.' [tr. note: sic on punctuation]