Plate, method of calculation of mountain attraction by John Henry Pratt Figure 2 illustrating the formula for calculating the mountain attraction on the stations of the Indian Arc. Subject: Geodesy Published in Philosophical Transactions as 'On the attraction of the Himalaya Mountains, and of the elevated regions beyond them, upon the plumb-line in India'. Written by Pratt at Deep River, Cape of Good Hope [Diep River, Western Cape, South Africa]. Communicated by J [James] Challis. Received by the Royal Society on 23 October 1854. Read 7 December 1854. 12 July 1854