MAPS OF INDIA. 273 



menced, under Colonel Priestley, an area of 60,000 square miles. 

 It is designed to show the principal variations in the surface 

 of the soil, and all hills, woods, channels, tanks, houses, irrigated 

 and unirrigated land. The village maps are on a scale of 16 

 inches to the mile, the district maps one inch to the mile, and 

 half an inch to the mile ; all the work being connected with the 

 stations of the great Trigonometrical Survey. Up to 1874 eight 

 districts had been completed, 17,941 village maps have been 

 drawn, and 15,607 reproduced by lithography, as well as 79 dis- 

 trict maps (21). 



Colonel Thuillier succeeded Sir Andrew Waugh as Surveyor- 

 General in 1 86 1 ; and his energy and talent for organization have 

 been devoted alike to improving the system of surveying in the 

 field, and to making its results more readily accessible to the public. 

 His topographical parties have worked in Central India and 

 Rajputana, in Ganjam and Orissa, and the wild hills bordering on 

 Assam; while the Revenue Surveys range over the North- West 

 and Central Provinces, Oudh, the Punjab, Sind, the Lower Pro- 

 vinces, and British Burma. 



In 1866 photo-zincography, under Captain Waterhouse, was 

 introduced into Colonel Thuillier's office at Calcutta, and by this 

 means the out-turn of work has been largely increased (22). 

 Many useful general maps have also been compiled and published. 

 Among them are the map of Punjab and its dependencies in four 

 sections (23) ; the maps of the North-west Provinces and of 

 Assam (24) ; and a new standard map of India on a scale of 64 

 miles to the inch. During 1873 no less than 271,528 copies of 

 maps were struck off, and as many as 5,090 were forwarded to 

 England. This gives some idea of the activity that prevails in 

 Colonel Thuillier's office. 



In 1868 the engraving of the remaining sheets of the Indian 

 Atlas was undertaken by Colonel Thuillier, and has since been 

 done at Calcutta (25). Several sheets of the Atlas have already 

 been engraved in India, and are admirably executed by the 



