talking about feathers."

"So I was, missy. Feathers are the plumage, when you take them all
together. But see here," added the Doctor, as he spread the Sparrow's
wings out, and held them where the children could look closely; "are the
wings all plumage, or is there something else?"

"Of course there's something else to wings," said Dodo; "meat and bones,
because I've eaten chickens' wings."

"Why didn't you say, Dodo, because there has to be something for the
feathers to stick into?" said Nat decidedly.

"You both have very good reasons," said the Doctor. "The plumage of the
wings grows out from the skin, just as feathers grow from any other part
of the body, only the large ones are fastened to the bones, so that they
stay tight in their proper places. If they were loose, they would fly up
when the bird beats the air with its wings, and get out of order. See
how smoothly they lie one over another! When the bird closes its wings,
they come together snugly along its sides. But when the wing is spread,
they slide apart--yet not too far to form a broad, flat surface, quite
stiff, but light and elastic. By beating the air with the wings birds
fly along. It is something like rowing a boat. This surface pushes
against the air as the flat blade of an oar pushes against the water.
That is why these large stiff feathers are called the rowers. When the
Wise Men talk Latin among themselves, they say _remiges_, for 'remiges'
means rowers."

"But, Doctor," said Rap, who was looking sharply at the Sparrow's wing,
"all the feathers are not like that. Here are a lot of little ones, in