Biermann’s photographs of minerals transformed her practice from the early personal views of her children to the close up, direct studies of form that would define her photographs of plants and people that followed and make her a central figure in New Objectivity photography. Thus 1926 began a period of intense productivity for Biermann that lasted until her untimely death, from liver disease, at the age of 35, in 1933. (https://artblart.com/tag/hans-finsler/)