Note 28 — Contributions from The Museum of History and Technology: Paper 38 The Earliest Electromagnetic Instruments
Reading edition
J. G. Poggendorf, “Physisch-chemische Untersuchungen zur näheren Kenntniss des Magnetismus der voltaischen Säule,” Isis von Oken (1821), vol. 8, pp. 687-710. Most of Poggendorf’s numerical data is also in C. H. Pfaff, Der Elektromagnetismus (Hamburg, 1824), along with some of Pfaff’s own work.