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Instructions for using heliograph of Signal Corps, U.S. Army, authorized by G.O. No. 99, 1888, amended by G.O. No. 59, 1889, and G.O. No. 32, 1896, Headquarters of Army, Adjutant-General's Office
| Location | Call # | Status |
|---|---|---|
| Joyner - Microforms B300 | CIS US EXEC MF W4213-4.2 | ✔ Available |
War Department telegraphic code
| Location | Call # | Status |
|---|---|---|
| Joyner - Microforms B300 | CIS US EXEC MF W4202-39 TO W4202-43 | ✔ Available |
U.S. Signal Service weather code, revised edition, Mar. 1, 1889
| Location | Call # | Status |
|---|---|---|
| Joyner - Microforms B300 | CIS US EXEC MF W4202-54 | ✔ Available |