From:
Sir John Herschel
To:
George Dollond
Date:
[4 January 1843]
Source of text:
TxU:H/L-0140; Reel 1054
Summary:
Approves GD's modification of driving wheel [for JH's actinoscope]. But GD's cost estimate exceeds total R.S.L. grant of £100. JH cannot approve more than £70; must have funds left for optics and clockwork mechanism.
Contributor:
John Herschel Project