MAPS OF INDIA. 277 



work of calculation and reduction in connection with the trigono- 

 metrical survey is done (42). From this source issue the charts of 

 triangulation and of levels, military maps for the use of the camps 

 of exercise, the compilations by Colonels Walker and Montgomerie, 

 and the maps of the topographical surveys of Kumaon, Gurhwal, 

 Kattiwar, and Guzerat. From Madras come Colonel Priestley's 

 village and district maps of the Revenue Survey, and similar work 

 is done at Bombay ; while the Marine Survey Department at Cal- 

 cutta prepares charts for publication by the Admiralty. Lastly, 

 in this country, the Geographical Department of the India Office 

 has the duty of bringing out those sheets of the Indian Atlas 

 which had been commenced before the work was transferred to 

 Calcutta. * This Department also occasionally produces and pub- 

 lishes maps under the sanction of the Secretary of State ; and, 

 through its agents, utilises the work in India, by bringing it 

 within the reach of students and others^ in all parts of the world. 



CLEMENTS R. MARKHAM. 



