Reference numberPP/2/2
Previous numbersPP/34/2
TitleLetter, 'Note on General Duane's soundless zones' from John Tyndall to [George Gabriel] Stokes
Date21 March 1882
DescriptionTyndall writes: 'In reference to one of the powerful fog-whistles established on the coast of Maine, General Duane remarks as follows :—“The most perplexing difficulties, however, arise from the fact that the signal often appears to be surrounded by a belt varying in radius from 1 to 1½ mile from which the sound appears to be entirely absent. Thus, in moving directly from a station the sound is audible for the distance of a mile, is then lost for about the same distance, after which it is again distinctly heard for a long time. This action is common to all ear signals, and has been at times observed at all the stations, at one of which the signal is situated on a bare rock 20 miles from the mainland, with no surrounding objects to affect the sound."' He presents his observations on 'the disappearance of the sound' and asks whether this is worth publication in the Proceedings of the Royal Society.

Annotations in pencil and ink.

Subject: Physics / Sound

Received 21 March 1882.

Written by Tyndall at the Royal Institution [London].

A version of this letter was published in volume 34 of the Proceedings of the Royal Society as 'Note on General Duane’s soundless zones'.
Physical descriptionInk and graphite pencil on paper
Digital imagesView item on Science in the Making
Access statusOpen
Related materialDOI: 10.1098/rspl.1882.0003
Fellows associated with this archive
NA8293Tyndall; John (1820 - 1893); natural philosopher1820 - 1893
NA8283Stokes; Sir; George Gabriel (1819 - 1903)1819 - 1903
Add to My Items

    Collection highlights

    Browse the records of some of our collections, which cover all branches of science and date from the 12th century onwards. These include the published works of Fellows of the Royal Society, personal papers of eminent scientists, letters and manuscripts sent to the Society or presented at meetings, and administrative records documenting the Society's activities since our foundation in 1660.

    The Royal Society

    The Royal Society is a Fellowship of many of
    the world's most eminent scientists and is the
    oldest scientific academy in continuous existence.
    Registered charity number 207043

    Website design ©CalmView


    + 44 207 451 2500
    (Lines open Mon-Fri, 9:00-17:00. Excludes bank holidays)

    6-9 Carlton House Terrace, London SW1Y 5AG

    Email Us →


    Subscribe to our newsletters to be updated with the
    latest news on innovation, events, articles and reports.

    Subscribe →

    © CalmView