Tim in"st sensitive instrument yfttmado is tho bolometer, originally invented by Langlcy, which is used for measuring variations in tho. radiation of heat. It registers to u millionth part of a degree. The heart of it is a platinum wire so thin that it. cannot he seen except when a jay of bright light is reflected from it.
Tho Sa.n Eranttisco telegraph office, which is the third largest in point of business transacted in tho entire United States, handles approximately 2,500.000 mess-ages per month, and due to the modcm equipment and efficiency of operation, at least 2,400,000 of these'messages are disposed of -within ten minutes from tho time thoy aw receired at the office.
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https://paperspast.natlib.govt.nz/newspapers/DOM19201208.2.69.4
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Dominion, Volume 14, Issue 63, 8 December 1920, Page 7
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114Page 7 Advertisements Column 4 Dominion, Volume 14, Issue 63, 8 December 1920, Page 7
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