Berlin, Franz Duncker, 1868; Leipzig, Duncker & Humbolt, 1872; Kjøbenhavn, Andr, Schous Forlag, 1872. 8vo. Bound in contemporary half cloth with gilt lettering to spine. Wear to capitals, internally minor occassional brownspots. (6), 66, (10), 79, (5), 52 pp.
First edition of three works on the early workers movements.