@misc{indiciae3202325d9a8c,
  title = {Investigations on microscopic foams and on protoplasm; experiments and observations directed towards a solution of the question of the physical conditions of the phenomena of life — Illustration, BHL page 23127616},
  year = {1894},
  url = {https://www.biodiversitylibrary.org/page/23127616},
  note = {Source identifier: page-23127616}
}