00749cam a22002291a 4500 ca 09002495 DLC 20260227111048.0 910517s1842 maua 000 0 eng ca 09002495 (OCoLC)23764257 DLC MoSW DLC premarc VK389 .P2 Parker, John R. (John Rowe), 1777-1844. A treatise upon telegraphs : embracing observations upon the semaphoric system, with a few remarks upon the utility of the marine telegraph flags / by John R. Parker. Boston : Kidder & Wright, 1842. 16 p. : ill. ; 24 cm. Cover title. Telegraph. Signals and signaling. 13917 13917