From:
Robert Monsey Rolfe, 1st Baron Cranworth of Cranworth
To:
Charles Robert Darwin
Date:
28 Dec 1865
Source of text:
DAR 161: 233
Summary:
Sending cheque for Down parish charities.
Contributor:
Darwin Correspondence Project
Sending cheque for Down parish charities.
Discusses recent progress in color photography. Stresses that what is most needed is a way of making negatives from which colored positives can be produced. Recounts JH's recent experiments relating to the action of light on solutions of platinum.