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May, Charles in addressee 
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From:
Sir John Herschel
To:
Charles May
Date:
[1832-11-23 or earli
Source of text:
TxU:H/L-0254 & -0255; Reel 1054
Summary:

Sends set of experimental spectacles for CM to use in testing persons for color-blindness, or 'Dichromic Vision.' Proposes several tests to be conducted with these.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Charles May
Date:
[17 December 1849]
Source of text:
TxU:H/L-0256; Reel 1054
Summary:

Learned of John Gorrie's mechanical ice-making method. Asks CM to send letter to JH recounting conversation of 11 Feb. 1848 in which JH told CM about JH's theory for making ice by compressing air. JH does not want to interfere with Gorrie's claim, but will submit CM's letter to Athenaeum and put on record, for sake of 'scientific history,' that JH was 'certain' that such a principle would work. Condolences for death of CM's partner.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Charles May
Date:
[5 December 1859]
Source of text:
RS:HS 12.315 & 23.291
Summary:

Thanks for the fragment of poor [Ben?]. Comments on this and the composition of the metal of bells.

Contributor:
John Herschel Project