Telegraphic cipher code
Subtitle: Gerrish system
Contributors: Gerrish, Willard Peabody
Publisher: The Observatory
Published: 1906
Place of publication: Cambridge
Language: eng
Number of pages: 15
Subjects: Cipher and telegraph codes; Astronomy
Other titles: Gerrish system.
Notes: At head of title:  Harvard College Observatory.

"The system and code were devised by Mr. Willard P. Gerrish, of this Observatory, who has prepared the following description and instructions." -- Pref.