Electrotype.—A duplicate of type or cuts for printing, the body of which is of type-metal and the face of copper which has been deposited by an electric current.
Electrolytic.—Decomposition of a substance, or a solution by means of an electric current.
Electrolysis.—About the same as electrolytic.
Elementary.—Simple; primary.
Electro-Chemistry.—Chemistry in which electricity is used.
Engine lathe.—A large and accurate screw cutting lathe fitted with all known attachments.
Entering Edge.—The front edge of the main plane of an aeroplane.
Ether.—A substance filling all space and in, by and through which light, electricity and magnetism acts and travels.
Evidence of conception.—A signed and sealed statement made at the time or shortly after you get the big idea which will serve as proof of the earliest time you thought of it.
Excerpt.—A part, or an extract of an article.