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Johnson, Manuel John, 1805 - 1859 (astronomer)


Found in 1 Collection or Record:


Papers on chronometer improvements, 1855 - 1859

Reference Code: GBR/0180/RGO 6/592
Scope and Contents Correspondence and papers concerning refinements and improvements to chronometers, including B. Russell's new escapements, with drawings; J.V. Weber's plan for equalising tension in the main spring, with plans; trials of J.M. Bloxam's gravity clock escapements; J.E. Merritt's compensating pendulum; E.T. Loseby's improvements in clocks, with plans and a description of the Leicester Exchange Clock; S. May's new chronometer balance; J.R. Hall's patent for improved clocks and watches; a hermetic...
Dates: 1855 - 1859
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  • Subject: Clocks X

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