"It is true that the sun, strictly speaking, does not move; the earth turns round, presenting the various countries in succession to the sun, but the effect is precisely the same as it would be if the sun moved, and, accordingly, I use that language. Now how long does it take the sun to pass round the earth?"
"Twenty-four hours."
"Does he go toward the west or toward the east from us?"
"Toward the west."
But it is not necessary to give the replies; the questions alone will be sufficient. The reader will observe that they inevitably lead the pupil, by short and simple steps, to a clear understanding of the point to be explained.
"Will the sun go toward or from the Rocky Mountains after leaving us?"
"How long did you say it takes the sun to go round the globe and come to us again?"
"How long to go half round?" "Quarter round?"
"How long will it take him to go to the Rocky Mountains?"
No answer.