seismograph (sismograf)

[ Seisura tion of the horizontal component of the seismic wave, and also the direction of translation of the wave. In practice, however, the results given by this simple and inexpensive apparatus have not been found satisfactory. The seismometer now most generally used in large observatories, or those where accurate work is expected, involves Zöllner's horizontal pendulum, the use of which was proposed many years ago, but which was put into the present practical form by Me rs. Ewing and Gray. The group of instruments constituting the seismometer of Prof. J. A. Ewing is arranged to give a complete record of every particular of the earthquake movement, by resolving it into three rectangular components - one vertical and two horizontal-and registering these by three distinct pointers on a sheet of smoked gla which is made to revolve uni formly by clockwork, the clock being started by an arrangement similar to that of the Palmier i seismoscope. To this is added another clock which gives the date of the shock and the interval which has elapsed since it took Another simpler form seismometer seine-engine (san'enjin), n. employed in hauling seines. [U. S.] seine-fisher (sān'fisher), n. A seiner. seine-gang (sān'gang), n. A body of men engaged in seining, together with their boats and other gear. Such a gang is a sailing-gang or a steamer gang, as they may work from a sailing ve el or to a steamer. seine-ground (san'ground), n. Same as sein ing-ground. A fisherman us