3480040 Electric Telegraph; Including Cooke and Wheatstone single and double needle instruments, 1859; (add.info.: Electric Telegraph; Including Cooke and Wheatstone single and double needle instruments (Figs 4 & 5). Sounder (Fig 7) for Morse telegraph which enabled signal to be \'read\' aurally; dispersing with taped messages. Wheatstone\'s Alphabetical Telegraph (Fig 9). Combination Printing Telegraph (Fig 10) in which A.A. Lovett brought together the best features of the House and Hughes telegraphs: 1859.); Universal History Archive/UIG; out of copyright.
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達志影像
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