Page:Hamel Telegraph history 1859.djvu/3

From Wikisource
Jump to navigation Jump to search
This page has been proofread, but needs to be validated.

HISTORICAL ACCOUNT
OF THE
INTRODUCTION
OF THE
GALVANIC AND ELECTRO-MAGNETIC
TELEGRAPH.

By Dr. HAMEL,
MEMBER OF THE IMPERIAL ACADEMY OF SCIENCES AT ST. PETERSBURG.

LONDON.
August, 1859.

Retrieved from "https://en.wikisource.org/w/index.php?title=Page:Hamel_Telegraph_history_1859.djvu/3&oldid=7965927"