INDEX


FOOTNOTES:

[1] Central Powers: Germany, Austria, and Bulgaria.

[2] Allies: Governments united by a treaty or having common interests. England, France, Belgium, Russia, Italy, the United States, and Japan are called the Allies.

[3] U-Boat: So called because it is an undersea boat, or Unterseeboote, as the Germans call their submarines.

[4] Paleozoic.—The next to the lowest geological series of strata.

[5] The Pterodactyl was one of these and it was the largest living thing that ever flew. It is pronounced Ter-o-dak´-til.

[6] A knot is the speed of a boat when she is making 1 nautical mile in 1 hour. A nautical mile is 6,080 feet.