Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 484
thod ofproducing it in air has been developed upon an industrial scale. A large number of ozonizers have been patented in Europe and America,and some of these are now being employed in connection with waterpurification and organic chemical works. The principle of the con-struction is much the same…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
