[8] Herschel, 508.
[9] It may be thought fanciful to suppose that because there is little or no solid matter (of any kind known to us) in Jupiter, his animals are not likely to have solid skeletons. The analogy is not very strong; but also, the weight assigned to it in the argument is small. Valeat quantum valere debet.
[10] Herschel, 522.
[11] Herschel, 510.
[12] According to Bessel, Schroeter once saw one bright point on the dark ground, near the boundary of light in Venus. This was taken as proving a mountain, estimated at 60,000 feet high. Pop. Vorles. p. 86.
[13] Herschel, 509.
CHAPTER X.
THEORY OF THE SOLAR SYSTEM.