A simplified presentation of Einstein's unified field equations, by       78343

  Tullio Levi-Civita

  [Author: Tullio Levi-Civita]

  [Translator: John Dougall]

  [Link: https://www.gutenberg.org/ebooks/78343]

  note: link will be active within two hours of posting.

Thanks to Produced by Laura Natal (Images generously made available by

Hathi Trust.)

Regards,

Robert