_October 31, 1910_--Moisant, with monoplane, at Belmont Park, wins the two-hour distance race with a record of 84 miles. His next nearest competitor covered but 57 miles. _November 14, 1910_--Eugene Ely, with biplane, flew from a staging on the deck of the U. S. Cruiser _Birmingham_ 8 miles to the shore near the mouth of Chesapeake Bay. The flight was intended to end at the Norfolk Navy Yard, but an accident to the propeller at starting forced Ely to make directly for the shore. _November 17, 1910_--Ralph Johnstone, holder of the world’s altitude record of 9,714 feet, was killed at Denver, Col., by a fall with his biplane. _November 23, 1910_--Drexel, at Philadelphia, reaches an altitude of 9,970 feet, passing all other altitude records. Coming down he made a straight glide of seven miles. _December 2, 1910_--Charles K. Hamilton, at Memphis, Tenn., flies 4 miles in 3 minutes 1 second, a speed of 79.2 miles per hour. This is a new world’s record. Chapter XX. EXPLANATION OF AERONAUTICAL TERMS. Every development in human progress is marked by a concurrent development in language. To express the new ideas, new words appear, or new meanings are given to words already in use. As yet, the vocabulary of aeronautics is in the same constructive and incomplete state as is the science to which it attempts to give voice, and the utmost that can be done at this time is to record such words and special meanings as are in use in the immediate present. A _Adjusting Plane_--A small plane, or surface, at the outer end of a wing, by which the lateral (from side to side) balance of an aeroplane is adjusted. It is not connected with the controlling mechanism, as are the ailerons--nor with any automatic device. _Aerodrome_--A term used by Professor Langley as a better name for the aeroplane; but latterly it has been applied to the buildings in which airships are housed, and also in a few instances, as a name for the course laid out for aeronautical contests. _Aerofoil_--Another name for the aeroplane, suggested as more accurate, considering that the surfaces are not true planes. _Aeronef_--Another name for an aeroplane. _Aeroplane_--The type of flying machine which is supported in the air by a spread of surfaces or planes, formerly flat, and therefore truly “plane,” but of late more or less curved. Even though not absolutely accurate, this term has resisted displacement by any other. _Aerostat_--A free balloon afloat in the air. _Aeronate_--A captive balloon. _Aileron_--A small movable plane at the wing-tips, or hinged between the main planes, usually at their outer ends, operated by the aviator to restore the lateral balance of the machine when disturbed.