Paper, 'An abstract of the results deduced from the measurement of an arc on the meridian extending from latitude 8° 9' 38".4, to latitude 18° 3' 23".6 N., being an amplitude of 9° 53' 45".2' by Lieut Colonel Willm [William] Lambton 55 manuscript pages and one plate showing a map of the principal triangles from which the arc between Punnae [Punnai, Tamil Nadu, India] and Daumergidda [Damargidda, Telangana, India] is deduced. Subject: Geodesy Published in Philosophical Transactions as 'An abstract of the results deduced from the measurement of an arc on the Meridian, extending from latitude 8° 9' 38",4,, to latitude 18° 3' 23", 6, N. being an amplitude of 9° 53' 45",2'. Read 21 May 1818. Abstract published in Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London [later Proceedings of the Royal Society of London], Volume 2, 1833. [1818]