| Description | Daily readings of vibrations and deflections using a [bar?] magnetometers, 'C4' and 'C25'. Columns for number of vibrations, time, difference, difference of 50 vibrations, bifilar, and torsion in an upper table, designated 'vibrations of C4'; columns for deflection, reading, mean and difference, bifilar and torsion in a lower table, designated 'deflections of C25'. With a monthly summary of results for June [p.31].
The notes are paper bound, the front cover inscribed: 'Observations for Intensity June 1846', partly obscured by rough calculations and sketches. The front cover has one instrument drawing; the rear cover an ink drawing of a domed astronomical observatory, with other notes. |