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Paper, 'On the reversal of the metallic lines as seen in over­exposed photographs of spectra' by W N [Walter Noel] Hartley

Reference number: PP/2/11

Date: 1882

Description

Hartley writes: 'In preparing series of photographs of metallic elements when their spectra are obtained by the action of a condensed spark passed between metallic electrodes, I have been very careful to ascertain the exact period of exposure of the sensitive plate to the rays, which will bring out the most characteristic lines without the additional diffused rays of the air-spectrum; at the same time very delicate and feeble air-lines are adequately shown.'

Annotations in pencil and ink.

Subject: Chemistry

Received 19 May 1882. Read 15 June 1882.

A version of this paper was published in volume 34 of the Proceedings of the Royal Society as 'On the reversal of the metallic lines as seen in over­exposed photographs of spectra'.

Reference number
PP/2/11
Earliest possible date
1882
Physical description
Ink and graphite pencil on paper
Page extent
3 pages
Format
Manuscript

Creator name

Walter Noel Hartley

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Citation

Walter Noel Hartley, Paper, 'On the reversal of the metallic lines as seen in over­exposed photographs of spectra' by W N [Walter Noel] Hartley, 1882, PP/2/11, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/pp_2_11/paper-on-the-reversal-of-the-metallic-lines-as-seen-in-overexposed-photographs-of-spectra-by-w-n-walter-noel-hartley, accessed on 07 February 2026

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  • Proceedings Papers

    The archival collection known as 'Proceedings Papers' is comprised of manuscripts and occasional proofs of scientific papers sent to the Royal Society which were read before meetings of Fellows and printed in full in the Proceedings of the Royal Society.

    Dates: 1882 - 1894

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