4 books in total, "Universe and humanity. History of research into nature and the utilization of natural forces in the service of peoples", richly illustrated, some in colour, with volumes II, III, IV and V, Berlin/Leipzig/Vienna/Stuttgart : German publishing house Bong & Co., oJ (probably around 1900), elaborate Art Nouveau half-leather cover with embedded embossed copper plaque (motif: atlas with globe), stronger signs of age and wear (among others, the covers are sanded, damaged, volume III, the plate is detached)
