Internal RAREP and Warning Coordination System (RAWARC) /

Mode of access: Internet.

Parnassus on wheels /

Mode of access: Internet.

Dictionnaire pour la correspondance télégraphique, secrète et économique.

Mode of access: Internet.

The secret corresponding vocabulary; adapted for use to Morse's electro-magnetic telegraph ...

Mode of access: Internet.

The Scrap-book, or, A selection of interesting and authentic anecdotes.

"... the stories here given are well authenticated as true."--From Preface, p. [3]

A lecture on telegraphic language, delivered before the Boston Marine Society, 5 February, 1833.

Mode of access: Internet.

American signal book, or, The United States telegraph vocabulary; being an appendix to Elford's marine telegraph signal book ... adapted to the use of the new semaphoric telegraph : to which is added the Boston Harbor signal book /

Mode of access: Internet.

The Science observer code.

-Pt. 1. Explanation of the number code, [by] S. C. Chandler, and J. Ritchie.-Pt. 1a. Number code, compiled by John Ritchie. 1885.-Pt.2 Phrase code, [by] S. C. Chandler, and J. Ritchie.-Pt. 3. Tables.