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Sydney Evershed: typescripts of unpublished papers

Als Henry Barron to Francis Ronalds

Als C Younghusband to Francis Ronalds

Als Henry Barron to Francis Ronalds

Series of 5 engravings by J E Wood from drawings by Francis Ronalds

Engraving [of declination magnetometer]

Pencil drawing [of stand for declination magnetometer]

Instructions (to the Mason) for erecting the masonry for the Bifilar self registering Magnetometer

Directions and Precautions [relating to the bifilar magnetometer]

'Catalogue etc 1st Copy'

'Catalogue etc 2nd Copy'

'Directions and precautions to be observed in the preparation and use of the Bifilar or Horizontal Force self-registering magnetometer'

Oscar Weiss