Report of the Director of the Royal Observatory, Hongkong, for the Year 1920 (Classic Reprint)

Report of the Director of the Royal Observatory, Hongkong, for the Year 1920 (Classic Reprint)

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Publisher's Synopsis

Excerpt from Report of the Director of the Royal Observatory, Hongkong, for the Year 1920

The registers are time-scaled electrically. An electro-magnet, operated by the hourly time signal, lifts the pens from the paper and clock work apparatus, adapted by Mr Evans in January, locks them until the 3rd minute when they are released and fall back on to the paper.

Sunshine Recorder. - In view of the interruption to the sunshine records caused by the Observatory wireless mast, a new sunshine recorder was obtained from Messrs J. Hicks and mounted on the south-west corner of the Main Building on January 6, 1921. Its records furnish the necessary corrections to those of the old instrument.

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Book information

ISBN: 9780243162581
Publisher: Fb&c Ltd
Imprint: Forgotten Books
Pub date:
Number of pages: 24
Weight: 45g
Height: 229mm
Width: 152mm
Spine width: 1mm