8. Q. Through what do all the light and heat of the sun that appear
upon our earth come? A. Through space that is two hundred degrees below
zero, and through utter darkness.
9. Q. At what velocity does light travel? A. One hundred and
eighty-five thousand miles per second.
10. Q. What is the highest velocity we can give a rifle ball? A. Two
thousand feet a second.
11. Q. How long does it take light to travel from the sun to the earth?
A. About eight minutes.