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Title: [Letter] 1771 Oct 1 [to] Peter Dollond/N. Maskelyne. 3p. on [Go to resource]
Description: [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]. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: Letter Temporal: 1771 Source: Science Museum Creator: Maskelyne, Nevil Identifier: 1992-227 Go to resource More Like this...
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