The New Encyclopaedia Britannica, Volume 18Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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Page 71
... telegraph bands of frequen- cies in the new cables with the result that the last of the exclusively telegraph transatlantic cables was abandoned in 1966 , after a century of cable - system service . In oceans other than the North ...
... telegraph bands of frequen- cies in the new cables with the result that the last of the exclusively telegraph transatlantic cables was abandoned in 1966 , after a century of cable - system service . In oceans other than the North ...
Page 73
... telegraph , " consisting of telegraph " tinfoil wrapped around a rotating cylinder , upon which writing , added by a pen dipped in varnish , could be scanned by a contact carried by an endless screw . The receiver was similar , except ...
... telegraph , " consisting of telegraph " tinfoil wrapped around a rotating cylinder , upon which writing , added by a pen dipped in varnish , could be scanned by a contact carried by an endless screw . The receiver was similar , except ...
Page 78
... Telegraph offices and agencies . Between 1945 and 1970 , the physical character of telegraph service changed considerably . Individual customers were less frequent users , except for the purpose of sending money . For other services the ...
... Telegraph offices and agencies . Between 1945 and 1970 , the physical character of telegraph service changed considerably . Individual customers were less frequent users , except for the purpose of sending money . For other services the ...
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