@misc{indiciae04860242d4db,
  title = {The elements of electrical engineering; a text book for technical schools and colleges. Vol. I. Direct current machines; electric distribution and lighting — Illustration, Page 40},
  year = {1907},
  url = {https://www.biodiversitylibrary.org/page/17499846},
  note = {Source identifier: page-17499846}
}