1925. 1st Edition. FIRST EDITION IN ORIGINAL PICTORIAL WRAPPERS. Near fine condition.
“This paper is an early example of a series of papers – which continued until his death – in which he explored, within the confines of general relativity, possible pathways in the direction of a unified field theory. Here he discusses whether it is possible to explain why electrons and protons have equal charge but unequal masses. He notes that a more natural solution to the field equations would be particles of opposite sign and equal mass, thus anticipating (but for unrelated "Select Annotated Biography 114, p. 307).
ALSO INCLUDED: Zeeman, “Lorentz en de Hypothese der Licht-Quanta Bij de Voortplanting Van Licht,” pp. 325-330 [Lorentz was Zeeman’s mentor].
ALSO INCLUDED: Some of the issue is a memorial to Lorentz. Item #1413
CONDITION DETAILS: Complete issue. Very slight wear at the spine. Bright and clean inside and out. Near fine condition.