An elementary book on electricity and magnetism and their applications
An introductory electricity and magnetism textbook by Dugald C. Jackson, John Price Jackson and Newton Henry Black, issued by Macmillan in New York in 1919 for secondary and first-year engineering students. Line diagrams show magnet poles and field paths, coil windings, armatures, bells, cells and switchboards, with lettered labels and arrows useful as schematic ornament or technical clip art.
