Reference numberAP/14/9
TitleUnpublished letter, 'On some new optical phaenomena' from John Herapath to Davies Gilbert
Date15 June 1830
DescriptionObservations made in early 1819 in consequence of a paper that Herapath read by [John] Knox in Philosophical Transactions for 1815 titled 'On some phenomena of colours, exhibited by thin plates'. Herapath sought to determine whether the effect observed by Knox was caused by an interference of light or was due to Isaac Newton's theory of fits of easy reflection and transmission. He found the latter to be the case. Includes four figures on separate pages.

Subject: Optics

Written by Herapath in Cranford [London]. Received by the Royal Society on 17 June [1830].
Physical descriptionInk on paper
Digital imagesView item on Science in the Making
Access statusOpen
Related materialDOI: 10.1098/rstl.1815.0011
Related records in the catalogueAP/14/9/1
Fellows associated with this archive
NA8707Gilbert; Davies (1767-1839)1767-1839
NA8414Newton; Sir; Isaac (1642 - 1727); natural philosopher and mathematician1642 - 1727
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