h have remained long in manuscript and are edited for the first
time. Of such _anecdota_ there are many collections; the earliest was
probably L.A. Muratori's, in 1709. In the more general and popular
acceptation of the word, however, anecdotes are short accounts of
detached interesting particulars. Of such anecdotes the collections
are almost infinite; the best in many respects is that compiled by
T. Byerley (d. 1826) and J. Clinton Robertson (d. 1852), known as the
_Percy Anecdotes_ (1820-1823).

ANEL, DOMINIQUE (1679-1730), French surgeon, was born at Toulouse
about 1679. After studying at Montpellier and Paris, he served as
surgeon-major in the French army in Alsace; then after two years at
Vienna he went to Italy and served in the Austrian army. In 1710 he
was teaching surgery in Rouen, whence he went to Genoa, and in 1716 he
was practising in Paris. He died about 1730. He was celebrated for his
successful surgical treatment of _fistula lacrymalis_, and while
at Genoa invented for use in connexion with the operation the
fine-pointed syringe still known by his name.

ANEMOMETER (from Gr. [Greek: anemos], wind, and [Greek: metron],
a measure), an instrument for measuring either the velocity or the
pressure of the wind. Anemometers may be divided into two classes, (1)
those that measure the velocity, (2) those that measure the pressure
of the wind, but inasmuch as there is a close connexion between the
pressure and the velocity, a suitable anemometer of either class will
give information about both these quantities.

Velocity anemometers may again be subdivided into two classes, (1)
those which do not require a wind vane or weathercock, (2) those
which do. The Robinson anemometer, invented (1846) by Dr. Thomas Romney
Robinson, of Armagh Observatory, is the best-known and most generally
used instrument, and belongs to the first of these. It consists
of four hemispherical cups, mounted one on each end of a pair of
horizontal arms, which lie at right angles to each other and form a
cross. A vertical axis round which the cups turn passes through the
centre of the cross; a train of wheel-work counts up the number of
turns which this axis makes, and from the number of turns made in any
given time the velocity of the wind during that time is calculated.
The cups are placed symmetrically on the end of the arms, and it is
easy to see that the wind always has the hollow of one cup presented
to it; the back of the cup