| Description | Comprises:
Note by Galton, which reads "Altazimuth, 1864, made for me by Casella";
Book of tables for determining heights by the boiling point of water;
Description of the pocket Altazimuth;
Galton's notes on observations with the Altazimuth;
Letter from George Henry Kinahan, informing Galton of his experiences with the Altazimuth, and possible improvements to the design. Dated 25 April 1865.
Two letters from L P Casella thanking Galton for his interest in the instrument, and regarding improvements, particularly to the compass. Dated July and September 1864. |