"Uncle," she said, "the stars all look alike to me, only some are little
and some are big. How can people know them by their names?"

"Just as anything else is known, dear," replied Uncle Robert, "by close
and careful study."

"I wish we could study the stars," said Frank.

"We will some time," replied Uncle Robert. "Come out on the piazza now,
and I will show you the north star. That will be a good beginning."




CHAPTER VII.

THE BAROMETER.


One day when it was Donald's turn to go for the mail he found among
Uncle Robert's letters a small paper. On the wrapper he read "United
States Weather Report."

It had come. There was already quite a line of figures in each of their
notebooks. Now they could see what this other record was like. As he
left the post office he stopped to look at the old thermometer beside
the door. Then he mounted Nell and rode down the village street and out
into the pleasant country road.

Uncle Robert was waiting for him on the porch, and as Donald rode away