(Lyon? circa 1860s).
Hardcover. A neatly written, beautifully illustrated and technologically innovative, French engineering manuscript. 189 pages, in two sections, handwritten and drawn in ink. Composed in a commercially purchased blank book of lightly ruled sheets, bound in quarter green leather and marbled paper over boards. Quarto (8” x 10”). The binding is rubbed and worn, else internally very good, clean and tight.
The volume contains two separate treatises, one of which is titled: “Cours de Physique: Electricité,” consisting of 25 pages in ink and 4 pages in pencil. It includes sections on Magnétisme, Electricité Dynamique, etc. The other, longer treatise is titled “Télégraphie: Cours pratique & physique.” It consists of 164 manuscript pages covering all aspects of the electrical telegraph. This treatise is illustrated throughout with numerous pen and ink drawings and diagrams, and is preceded by a detailed chart of Continental Morse Code, titled “Signaux Télégraphie”.
A remarkable, unique relic from the first age of rapid electrical communication.