tromometer (tromometer)

a trembling ( sometimes called earth-tremors; a micro seismograph. Numerous arrangements have been tried for this purpose, most of which combine the pendulum with some form of micrometric apparatus. tromometric (trom-o-met'rik), a. [ trompt, trompelt. Obsolete forms of trump1. trompe2 (tromp), n. [F. trompe, lit. a trump: see trump1.] The apparatus by which the blast is produced in the Catalan forge. It is a simple, effective, and ingenious contrivance for producing a continuous and equable blast, but its use is restricted to localities where a fall of water from a height of several yards can be obtained. The principle is that water can be made to fall through a pipe in such a way that it will draw in through side openings a considerable amount of air, which by a simple and ingenious arrangement can be utilized as a constant current or blast, and which has the merit of costing almost nothing. It has been utilized to a limited extent elsewhere than in the department of Ariège, in the south of France, where it was formerly very generally employed. Iron has been made in that district for more than 600 years, but the use of the trompe was not introduced until the end of the seventeenth century. François.