| 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'.
Front cover inscribed: 'Absolute Determination Observations for the month of December 1846'. |