Paper, 'On a varying cylindrical lens' by Tempest Anderson

Description

Anderson writes: 'A cylindrical lens of continuously varying power has long been a desideratum, and one was constructed and described by Professor Stokes, at page 10 of the Report of the British Association for 1849 (Transactions of the Sections). He points out that— “If two piano-cylindrical lenses of equal radius, one concave and the other convex, be fixed, one in the lid and the other in the body of a small round wooden box, with a hole in the top and bottom, so as to be as nearly as possible in contact, the lenses will neutralise each other when the axes of the surfaces are parallel; and by merely turning the lid round an astigmatic lens may be formed, of a power varying continuously from zero to twice the astigmatic power of either lens.”'

Annotations in pencil and ink.

Subject: Optics

Received 18 November 1886. Read 16 December 1886. Communicated by Alexander William Williamson.

A version of this paper was published in volume 41 of the Proceedings of the Royal Society as 'On a varying cylindrical lens'.

Reference number

PP/9/18

Earliest possible date

1886

Physical description

Ink and graphite pencil on paper

Page extent

3 pages

Format

Manuscript