@misc{indiciaec0e868659acf,
  title = {Negretti \& Zambra's encyclopædic illustrated and descriptive reference catalogue of optical, mathematical, physical, photographic and standard meteorological instruments, manufactured and sold by them — Illustration, Page 350},
  year = {1887},
  url = {https://www.biodiversitylibrary.org/page/16784188},
  note = {Source identifier: page-16784188}
}