Q. Name the present sovereigns of European countries.
A. Great Britain, Victoria; Austria-Hungary, Franz Josef I.; Belgium, Leopold II.; Denmark, Christian IX.; Germany, Wilhelm I.; Prussia, Wilhelm I.; Bavaria, Ludwig II.; Italy, Umberto I.; Netherlands, Willem III.; Portugal, Luis I.; Norway and Sweden, Oscar II.; Spain, Alfonso XII.; Russia, Alexander III.; Turkey, Abdul Hamid II.
Q. Is it not probable that those comets which are supposed never to reappear will do so after an indefinite period?
A. It can not now be said that any comet revolves in a hyperbolic orbit, and thus it is possible that ultimately all will return to our system.
Q. Who discovered the revolution of the earth about the sun?
A. Copernicus revived the theory, but made the orbit a circle; Kepler showed it to be an ellipse.
Q. How can this theory be proved?
A. It does not admit of ocular demonstration, but can be shown to fit all cases, and can be proved to be the necessary consequence of the law of gravitation.
Q. How do you pronounce “Tucson,” the name of a city of Arizona?