1889.] Address. 81 



evidence already obtained, by swinging pendulums and by levelling, of 

 the increase of density in the submarine strata. 



Topographical Surveys. — General Surveys, in continuation of those 

 of former seasons, were carried on in Baluchistan, Gujarat, the Panjab, 

 Himalayas, and the Madura and Tinnevelly districts of Madras, as well as 

 the reconnaissance survey of Upper Burma, as far as the movements of 

 the troops would permit. Forest surveys were continued in Lower 

 Burma, in the Belgaum and Thana districts of Bombay, and commenced 

 in the Hoshungabad District of the Central Provinces. 



It has been decided to postpone the Topographical Survey of the 

 portions of the Madras Presidency still remaining unsurveyed, and the 

 party that was engaged thereon will be exclusively employed on Foxiest 

 Surveys for the Madras Govexmrnent. 



Revenue Surveys. — Cadastral Surveys, by which each plot of land 

 held with separate occupancy rights is sepax-ately surveyed and the xughta 

 of the occupiers recorded, have been conducted in the Gorakpur, Basti, 

 Mirzapur and Terai Districts of the N.-W. Provinces ; in the Bilaspur 

 Distxicts of the Centx-al Provinces ; the Nowgong District of Assam ; 

 the Thongwa District of Burma ; also in two Govexmment estates and in 

 three Ward's estates in different parts of Oiissa and Bengal. Traverse 

 operations, designed so as to furnish a frame wox'k on which cadastral 

 surveys are to be executed by the permanent staff of village surveyors 

 and accoxxntants, have been confined to the Central Provinces, and 

 have been cax'iied out over veiy lai'ge areas in nine districts. Several 

 Districts in the Punjab have also been traversed for the construction of 

 a new series of maps for the Province, from the Settlement Suxweys ; 

 a large and important work which has made good progress. The new 

 Survey of the Town of Calcxxtta, executed with great minuteness of detail 

 on the scale of 50 feet to an inch, including the delineation of the 

 boxxndaries of the separate propex*ties, has been completed, and the 

 drawing of the maps in a style suitable for publication by photozinco- 

 graphy is now occxxpying the attention of the Surveyors. The new 

 map is much wanted, the best available xnap being Simm's, which was 

 made in 1SA7 to 1849 and has long beexx out of date. 



Publishing Offices. — Vexy large numbers of maps and other subjects 

 have been x'eproduced during the year by copper-plate engraving, litho- 

 graphy, photozincography, heliogx'avxxre and other photographic pro- 

 cesses, not only for the Survey Department, but for many other Govern- 

 ment Departments. 



The amount of work tuxnxedoutin the printing offices of the Survey 

 may be judged from the fact that the total number of copies of maps 

 &c. printed ixx Calcutta during the last Survey year was nearly a million. 



