These are our answers to the questions proposed to the Observatory of Cambridge by the members of the Gun Club:
To sum up—
1st. The cannon ought to be planted in a country situated between 0@ and 28@ of N. or S. lat.
2nd. It ought to be pointed directly toward the zenith of the place.
3rd. The projectile ought to be propelled with an initial velocity of 12,000 yards per second.