From:
Alexander Wight, Jr.
To:
Sir John Herschel
Date:
[3 April 1856]
Source of text:
RS:HS 18.246
Summary:
Sends small lens. Its components neither parallel nor concentric; contains water. Suggests new polishing method. Estimates 4-foot lens would cost £7-£8. [JH Note: Tested and returned lens. Noted advantages and deficiencies and suggests improvements. Listed others who built similar lenses.]
Contributor:
John Herschel Project