. St. Nicholas [serial] . .four-footed creatures? Then there are the fish. Onewould rather expect that, as theymove their tails from side toside, they would flap alternatelywith the fins, which are theirhands and feet. Who can tellwhether they do or not, andwhether all fish at all times fol-low one rule? By the way, howdoes a frog use its hands ? The great anatomist, E. RayLankester, has lately pointed outthat while the thousand-legs,such as our common gally-worm,advance two feet of a pair to-gether, the centipeds, which aremuch like them, do exactly theopposite; and the swimmingworms also alt
. St. Nicholas [serial] . .four-footed creatures? Then there are the fish. Onewould rather expect that, as theymove their tails from side toside, they would flap alternatelywith the fins, which are theirhands and feet. Who can tellwhether they do or not, andwhether all fish at all times fol-low one rule? By the way, howdoes a frog use its hands ? The great anatomist, E. RayLankester, has lately pointed outthat while the thousand-legs,such as our common gally-worm,advance two feet of a pair to-gether, the centipeds, which aremuch like them, do exactly theopposite; and the swimmingworms also alternate the strokeof each pair of paddles. I doubtif many people can tell on whichsystem the caterpillar manages (upper figure)its dozen or so legs, or whetherthe adult insect walks, trots, paces, or gallopson its six. How does the spider use eight ? Altogether this is a large field for observa-tion, a field, too, where any one may discovernew facts as yet unrecorded, and thus add tothe store of knowledge. E. T.
Size: 1403px × 1781px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthordodgemar, bookcentury1800, bookdecade1870, bookyear1873
