[Ms. notebook of circuit diagrams, some with accompanying text, re submarine cable equipment] / J. R. Rowley. [ca.1930-60. ca.50 pages, some illustrated, of a 300-page book randomly used] Ms. notebook of circuit diagrams 1930-1960
Magnetism and Electricity / Willis F. Dent. 1869 [Manuscript notebook, 75p. used. Reference made to work of Volta, Cruickshank, Faraday et al; to electric telegraph; and to numerous experiments. Inside covers bears date 1869 Nov 3] Magnetism and Electricity, Willis F. Dent. 1869 1869