@misc{indiciae14d5e5e62f43,
  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 313},
  year = {1887},
  url = {https://www.biodiversitylibrary.org/page/16784151},
  note = {Source identifier: page-16784151}
}