Druck von B. Vopelius in Jena: Carl Zeiss Jena 1934. 113 pages. Flexible cloth wrappers. 7 1/4 x 10 3/4 inches. Near Fine. Boards. 
With 45 figures of microscopes and their accessories. Zeiss still makes some of the best optics in the world and their instruments, even from this time period, are collected and used still by enthusiasts and scientists.