Number of Images: 1; Color: Color; Size: 12.75w x 7.75h; Type of Image: Document; Medium: Paper
Type:
Document
Paper
Place:
United States
Date:
c. 1844
Category:
Historic Images of the Smithsonian
Notes:
Alfred Vail was a key partner to American inventor Samuel Morse and is credited with designing the machine and alpha code used in the creation of the electromagnetic telegraph.
For other materials relevant to Vail's work, see Negative Numbers SIA2011-0824 to SIA2011-0827, SIA2011-08289, and SIA2011-0830. For letters between Vail, Morse, and first Smithsonian Secretary Joseph Henry, see Negative Numbers SIA2011-0814 to SIA2011-0823.
Summary:
These are two pages from Alfred Vail's experiment notebook. On the left page is his drawing of the electromagnetic telegraph, and on the right page is the alpha code, better know as Morse Code, that Vail developed for sending messages using the electromagnetic telegraph.
Contained within:
Smithsonian Institution Archives, Record Unit 7055, Box 5, Folder: 7