Reference numberMS/929/1/135
TitleLetter from Alexander Muirhead, FRS, The Lodge, Shortlands, to James Mackenzie Davidson
Date17 December 1904
DescriptionInforms Mackenzie Davidson that he has just taken a look at Shallenhager's patent. Notes that one cannot tell if it is valid without studying other publications which would be too large a job for him to undertake. Explains that since 1895 there has been a good deal done in the regulations of the current in inductance coils. Asks if Mackenzie Davidson has tried to increase the power factor of his induction coil by putting an adjustable inductance coil in the primary current.
Extent4 sides
Access statusOpen
Fellows associated with this archive
NA1682Muirhead; Alexander (1848 - 1920)1848 - 1920
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