| Description | Tables of daily 'term' observations made at Trivandrum [Thiruvananthapuram], Kerala. Readings from the declination, horizontal, and vertical force magentometers. With 'Absolute determinations & Coefficients of Reductions for March 1842' [p.6], including notes on instruments.
Headed [p.1]: 'Observatory at Trevandrum February 1842. Abstract of daily "Term" Observations'. Signed [p.6] by John Caldecott and inscribed 'For the Royal Society despatched April 18th 1842'. |