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Maclear, Thomas in correspondent 
1830-1839::1835::04 in date 
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Herschel11699

From:
Thomas Maclear
To:
Sir John Herschel
Date:
[13 April 1835]
Source of text:
RS:HS 12.63
Summary:

Has arranged with Lady Herschel for Sir John to spend a night at the Observatory. Come early; then he can reverse the transit instrument. Is not satisfied with the performance of the transit clock. Intends to clean it. Is ready to adopt JH's suggestions for measuring the tides. Curious that JH and [T. G.?] Taylor should suggest similar plans for measuring the divisions of a mural circle.

Contributor:
John Herschel Project

Herschel12100

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[14 April 1835]
Source of text:
RS:HS 21.174
Summary:

About the difficulty of measuring high and low tide with the instruments available to TM; offers the design of an instrument that would measure the mid-point between high and low tides.

Contributor:
John Herschel Project
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