David tightened his blue serge apron roll about his waist, and followed up into the observatory, smiling, but ready to depreciate everything.
“Ay, but it’s a big change,” he said; “no sacks o’ wheat, no reg’lar machinery. There’s the master’s tallow scoop; he give me a look through it once, and there was the moon all covered with spots o’ grease like you see on soup sometimes. Well, it’s his’n, and he’s a right to do what he likes with the place. Ah, many’s the time I’ve been up here too. Why, Jose the carpenter chap’s cut away the top of the post here. You used to be able to move a bit of an iron contrapshum, and that would send the fan spinning, and the whole top would work round till the sails faced the wind.”
“Well, the whole top will work round now, David.”
“Not it, sir, without the sails.”
“But I tell you it will,” said Tom, moving a bar, and throwing open the long shutter, which fell back easily, letting in a long strip of sunshine, and giving a view of the blue sky from low-down toward the horizon to the zenith.
“Well, you do get plenty of ventilation,” said David oracularly. “Nothing like plenty of air for plants, and it’s good for humans too. Make you grow strong and stocky, Master Tom. But the top used to turn all round in the old days.”
“So it does now, so that uncle can direct his telescope any way. Look here!”
The boy moved to the side, and took hold of an endless rope, run round a wheel fixed to the side, pulled at the rope, and the wheel began to revolve, turning with it a small cogged barrel, which acted in turn upon the row of cogs belonging to the bottom of the woodwork dome, which began to move steadily round.
“Well, that caps me,” said David. “I thought it was a fixter now.”
“And you thought wrong, Davy,” said Tom, going up two or three steps, and passing out through the open shutter, and lowering himself into the little gallery that had once communicated with the fan, and here he stood looking out.