Signal Book

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A signal book used in the United States Navy which includes a key to interpret messages.


Benson John Lossing, ed. Harper's Encyclopedia of United States History (vol. 8) (New York, NY: Harper and Brothers, 1912)


TIFF (full resolution)

2400×1462, 1.4 MiB

Large GIF

1024×623, 171.8 KiB

Medium GIF

640×389, 88.8 KiB

Small GIF

320×194, 28.7 KiB