HYDBOBBOMIC ACID 96 HYDROCARBON and making long flights, and even able to 126 feet. The wings are 12 feet broad, withstand a comparatively heavy sea and the space between the wings is 12 when afloat upon the surface of the wa- feet. The planes themselves weigh ter. Planes of this type were used dur- about 13,000 pounds, and have m trial ing the war for coast patrol work, sub- flights carried as many as fifty men, marine hunting, and for bombing flights, See Aeronautics. TOP ELEVATION OF THE HYDROAEROPLANE NC-4 A SIDE VIEW OF THE NC-4 A FRONT VIEW OF THE NC-4 but as a battle plane they can usually be outmaneuvered by the faster and lighter land planes. Glenn Curtiss was one of the pioneers in the development of this type of air craft, and it was in a hydroaeroplane built by his company that the first successful transatlantic flight was made. These aeroplanes, the Navy Curtiss (NC boats), are of the most advanced construction and design. The N. C. boats are fitted with three Liberty motors developing about 1,200 horse power, and have a wing spread of HYDROBROMIC ACID, H Br, a colorless gas, occurring in solution as a colorless, odorless liquid, with a specific gravity of 1077. Formed when hydro- gen and bromine vapor are passed over warm platinum sponge, or when potas- sium bromide is distilled with phos- phoric acid. Used in medicine as a seda- tive, and in the preparation of various organic compounds. HYDROCARBON, a name given to compounds of one or more atoms of car-
