Description | Hourly observations of the vertical force magnetometer at the Colaba Observatory, arranged by day. Columns for Gottingen mean time, Bombay mean time, observed reading, correction, correct reading, a+a/2, 'G', thermometer, observer's initial and general remarks.
The front cover [p.1] has several practice signatures in pencil: 'J.H. Dunn, Colaba, Bombay. |