5 volumes in total, universe and humanity. History of research into nature and the utilization of natural forces in the service of peoples, Berlin/Leipzig/Vienna/Stuttgart: Deutsches Verlagshaus Bong & Co, oJ (probably around 1900), very decorative orig. Art Nouveau half-leather binding, rich gold and blind embossing, cover made of green linen with inlaid copper relief plates (Altas with the globe), red book edge. numerous illustrations, drawings, facsimiles, double-sided color plates etc., differ. Signs of age and wear (including rubbed covers, damaged)
