old engraved illustration of morse code, a telecommunications method which encodes text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs - 電報機 個照片及圖片檔手寫字
woman at a table sending telegrams, stacks of papers aside of her on the ground, times from all regions of the world before her - 電報機 幅插畫檔、美工圖案、卡通及圖標白人, 歐洲文化
Samuel Morse's telegraph that was used to send the first telegraph messaged from Washington, DC to Baltimore on May 24, 1844
antique black and white photograph: field telegraph station, philippines - 電報機 幅插畫檔、美工圖案、卡通及圖標19世紀風格, 美國
old engraved illustration of telegraph, morse's recording telegraph, morse code - 電報機 個照片及圖片檔19世紀風格, 復古風格
Men playing a game of chess in London against a team in Portsmouth by electric telegraph in the electric telegraph room of the South Western Railway...男人
Trainee wireless telegraph operator at Marconi House, London, 18th March 1913. The 5 kilowatt apparatus is similar to that used on ocean-going liners.歸檔
old engraved illustration of a telegram punched in a paper tape - the holes on one side represent the dashes and on the other the dots of the morse alphabet - 電報機 個照片及圖片檔
Maritime radio operators are trained at navigation schools in Hamburg and Bremen for work on German merchant fleet ships.雙人
typewriter for the transmission of writings in the distance, 1890s, 19th century history technology - 電報機 幅插畫檔、美工圖案、卡通及圖標歸檔
Operator receiving a message in Morse code on printing telegraph. In box under table are the wet cells supplying electricity. Wood engraving 1887
Poster celebrates the connection of America and Europe via transatlantic telegraph, 1858. Illustration by Charles Magnus & Co.
