Letter 1771 Oct 1 [to] Peter Dollond/N. Maskelyne
- Made:
- 1771
- maker:
- Nevil Maskelyne
[Letter] 1771 Oct 1 [to] Peter Dollond/N. Maskelyne. 3p. on 2 leaves. [Explains with an optical diagram the difficulty encountered by Dollond in obtaining a clear image with a refracting telescope when a red glass [filter] is inserted [for solar observations].
