| Description | Observations of the vertical force of the Earth's magnetic field, using 'No. 2 Lloyd's needle'. With columns under the headings: needle, poles direct, poles reversed and sums. These records were kept at 'Two Gun Battery', Sarawak [pp.3-5, pp.12-14]; the Magnetic Observatory, Sarawak [pp.6-11, pp.15-16, pp.20-22, pp.28-39, pp.45-54]; the mouth of the Sepang river [pp.17-19]; and Santor Diamond Mines [pp.23-27, pp.40-44].
Headed [p.1]: 'Dip for October & November 1842'. |