Leipzig: B. G. Teubner 1909. First Edition. , 332,  pages. 8vo. Publisher's green cloth gilt. Binding split at title page showing mesh, corner tips worn, several closed tears. Front pastedown and flyleaf is advertisement for Teubner titles, dated Juki, 1908. Clearly a read copy, still usable for the same. Good. Cloth. 
"The Nobel Prize in Physics 1902 was awarded jointly to Hendrik Antoon Lorentz and Pieter Zeeman "in recognition of the extraordinary service they rendered by their researches into the influence of magnetism upon radiation phenomena...It may well be said that Lorentz was regarded by all theoretical physicists as the world’s leading spirit, who completed what was left unfinished by his predecessors and prepared the ground for the fruitful reception of the new ideas based on the quantum theory." (nobel org)
"One of Lorentz' marked characteristics was an uncomon openness to new trains of thought. Again and again Einstein, Erwin Schrodinger, and other theorists sought his opinion which was at once sympathetic, informed, and critical....[The theory of Electrons, 1909 is] the best introduction to Lorentz' electron theory in English...an expanded version of his 1906 Columbia University lectures." DSB 7/8, pp 487-500.
"B. G. Teubners Sammlung von Lehrbüchern auf dem Gebiete der mathematischen Wissenschaften mit Einschluss ihrer Anwendungen, Band XXIX"