Description | Daily readings of vibrations and deflections using a [bar?] magnetometer, designated 'A51'. Columns for number of vibrations, time, difference, difference of 50 vibrations, bifilar, and torsion in an upper table, designated 'vibrations'; columns for deflection, reading, mean and difference, bifilar and torsion in a lower table, designated 'deflections'. With a monthly summary of results for February [p.26].
The notes are paper bound, the front cover inscribed: 'February 1846' . Each sheet is headed 'Observations for Intensity'. |