440 



Memoir on the Indian Surveys^ 



The measurement of a ba55e of verification, and the observation of a 

 set of zenith distances near Beder, in the year 1815, by Lie ut.-Colonel 

 Lambton, brought the great meridional series up to the parallel of 18^ 

 4', and with it, of course, the series of Severndroog. In 1817 this 

 series was continued to the northward to the Godavery river, the 

 triangles then branched off to the eastward to meet the Yerrakondah 

 mericljan, down which a series was carried to the former points on the 

 Krishna. In 1819 Colonel Lambton determined to bring up the series 

 of Carangooly to the same parallel with those of Yerrakondah and 

 Severndroog ; but as the operations proceeded the features of the 

 country seemed favourable for cotaipleting the intermediate series of 

 Kylasgurh also, and by the end of 1820 both these series were satis- 

 factorily conducted to the Godavery, though, it must be observed, that 

 the unhealthiness of the tracts was such as to occasion g-reat loss of 

 lives, and to ruin the constitutions of almost all engaged in the labori- 

 ous task. In the two following years the meridional arc was extended 

 to Ellichpoor, and a base of verification measured in the valley of 

 Berar by Colonel Lambton in person : the lateral series connecting 

 Bombay with the base line at Daumergiddah, in latitude IS** 3', was 

 temporarily interrupted by the death of this distinguished officer on 

 the 20th of January, 1823. From that period the operations have 

 devolved on Major Everest, F. R. S., whose conjoint labours with Colo- 

 nel Lambton have been brought before the public in a separate publi- 

 cation. Major Everest has subsequently carried on the meridional arc 

 from Seronj, in latitude 24^ 7', to Kedar Kanta, in the Himalaya 

 mountains, in latitude 31° 2', verified by abase line in the Deyra Doon,. 

 situated near the foot of those mountains. 



A lateral series connecting Calcutta and Benares with the great meri- 

 dional arc at Seronj, by Mr. Oliver, and another series from Bombay,, 

 by Lieut. Shortrede, has established the relative positions of the three 

 principal stations in India. 



A series of triangles by Captains Ward, Conner, Garling, Snell, and 

 Jervis, has been carried on in the different provinces south of the 20th 

 degree oflatitute; and other lateral series, on four distinct meridians, 

 are in progress to the eastward of the meridional arc, by Lieuts. 

 V/ilcox, Boileau, Macdonald, Waugh, and Renny. 



I have purposely abstained from any observations on the continua- 

 tion of the operations by Major Everest, as they will probably be 

 given to the public by himself at no distant period, but consider it a 

 theme of pride to our country to have had two so highly distinguished 



