"You say Chicago is the nearest station to us, uncle," said Frank, looking down the temperature column. "My record for that day is not so very different from the one given here for Chicago."
"Which shows that yours is probably as nearly correct as this is," said
Uncle Robert, with an encouraging smile.
"But I haven't one number in my book like that," said Susie, looking disappointed. "I don't see why."
[Illustration: Susie's notebook]
"I do," replied Uncle Robert. "You make your record at noon, and of course, it is warmer then. That is what your book says, does it not?"
"Yes," said Susie, "every number in my book is more than that one."
"That is right," was the reply, "for this record was made at eight o'clock in the morning, which is nearer Frank's hour than it is yours. So we would expect his to be nearer like this than yours, wouldn't we?"
"It isn't like mine either," said Donald.
"We may have one some time that will be more like yours," said Uncle Robert, "for these records are made at eight in the evening as well as in the morning."
"Uncle," said Frank, looking closely at the map, "here it says 'High,' and there it says 'Low.' What does that mean?"