Rollo's Philosophy. [Air]

waked, he heard a sharp c

Nathan, I believe th

oo sleepy to hea

not see very well. He listened. He heard a low, moaning sound made by the

rm. At first he was glad of it, for he liked snow-storms. But then, pretty soon, he

these duties, Rollo proposed to Nathan that they should go out into the shed, and see how the storm came on. There was a lar

ped up upon the fence and against the windows; and there was a curious-shaped drift, with the top

it clears up, I mean to

oo," sai

d Rollo, "it is

n; "who is that po

aid Rollo. "I mean to go ou

ing to get ther

," said Rollo, "and go ri

ould go," s

lo, "I can carry

ased at the prospect of both getting into the barn to see w

to fasten his pantaloons around them. When all was ready, Rollo sat d

" said Rollo, "and that I'm kn

," said Nathan, "when

e difficulty, but yet safely, until he came to the great drift; and, after wallowing into the midst of it, he lost his balan

't cry. I'll run and get Jon

id down his hammer upon the bench, and followed Rollo. He found Nathan

nd told him not to cry. "I've got a fire in the shop," said h

some sticks, which made a great blaze; and so Nathan soon got warm and dry, and forgot all his troubles. Then Jonas sat him up, upon a high stool,

er with the bello

out of order,"

eated Nathan; "w

er," said Jonas. "I will show

bellows. There was a hole in one of the sides, but no hole in the other.

hole for?"

et the air in

the air to come i

ind of," s

wind out of ai

ws full of air, and then blow it out t

motion," said Rollo.

than could see into the bellows. He saw that there was a lit

valve?" sai

said

t for?" sa

wind from coming

he wind to go out of t

they want it to go to th

the hole, and so it has to go out of the lo

go out at all

wind out. It can't go out of the hole whence it came in, because the clapper stops i

he could get at the clapper to mend it. He told the boys

oing to make i

d Jonas, "if you

is down over the hole. It covered it entirely. Then he took some small carpet nails, and nailed one of the ends of the leather down to the

when it lies down in its place, it covers the hole completely; and yet I

clapper. He put one little carpet nail into each end of the strap. The strap, when it was nailed, passed directly across the clapper or valve.

r up a little way, but I can't push it fa

han, "do you want i

I get the leather all nailed on again,

g us about it in the m

comes in by the hole. The clapper lifts up a little way, and lets it in. Then, when I press down the h

t?" sai

hen to fall down and cover the hole exactly, and prevent the air going out the same way it came in. So, as it cannot g

then?" s

ring the two sides of the bellows together a

ike to try,

e are some other experiments

they might try the experiment. He took hold of the nose of the bell

of the handles, and pull them ap

led the handles apart

the valve will close itself; and then you will fi

mb over the hole, an

e sides came together again

rise. He did not know what to mak

said he. And he took the bellows o

to the one where he had been working, where the le

ifficulty. When I have nailed

leak?" sa

ir all out through there. I did not know that that was open. Let m

STI

only one edge, or both edges? Why did he want the other edge to be left at liberty? How did he prevent its lifting up too far? What was the first experiment which he performed with the bellows, after he

to co