"An electric bell consists mainly of an electromagnet, E, and a vibrating armature that carries a hammer,…
"An electrodynamometer is a galvanometer with two coils, at least one of which is movable, and through…
"In this mode of evaporating a variety of plans and arrangements for connivence are employed. The pans…
"The rheostat is an apparatus for admitting the current to the motor gradually, so as not to heat and…
"This term is applied indiscriminately to evaporators with steam-pipe, whether arranged in the form…