80 Address. [Feb. 



(3). Explorations in Tibet by Lama U. G., in 1883. The Lama 

 started from Darjiiing and went to Lhassa via the Donkya Pass, Shi- 

 .^atse and the Yamdok Tso Lake, returning via the Bam Tso Lake, 

 Tangha Pass and Chumbi Valley. 



(4.) Explorations in Sikkim, Bhutan and Tibet, by R. N., in 1885 

 86. He gained a good deal of information about Bhutan. 



(5.) Exploration in Tibet and Bhutan, by P. A., in 1885-86. He 

 accompanied R. N. and has contributed the route along the range to the 

 west of the Wong-chha to the vicinity of Baxa Duar. 



The volume is a very valuable contribution to the knowledge of 

 these little-known regions and a testimony to the arduous labours of 

 these intrepid explorers. 



The appendices to the General Report on the operations of the 

 Survey of India Department, for 1887-88, contain much interesting in- 

 formation on the Electro-telegraphic Longitude oj)erations carried on 

 by Colonels G. Strahan and W. J. Heaviside, R. E. ; on the Tidal ob- 

 servations, by Col. M. W. Rogers, R. E., including values of the Tidal 

 Constants for various Stations ; a very interesting account, by Capt. H. 

 M. Jackson, R. E., of the Survey operations in the Southern Shan States, 

 containing a good deal of information about the country and people ; 

 also a note by Col. H. C. B. Tanner on Trans-Himalayan geography, iu 

 which he discusses our present knowledge of Nepal geography, and of 

 the geography of Bhutan and Assam and the settlement of the much- 

 vexed question of the course of the Sangpo river. 



PuhlisJnng Offices. During the year the Photographic and Litho- 

 graphic Offices, which have hitherto been accommodated in three dif- 

 ferent private houses, were brought together in a handsome new build- 

 ing. No. 14 Wood Street, and the whole of the Survey of India Offices 

 are now housed in a suitable and efficient manner. As usual, a very 

 large number of maps and various other subjects have been produced 

 during the year by lithography and photography. A new edition of 

 the map of India on the scale of 32 miles to the inch, which was much 

 wanted, has been published and a third edition is in hand. A new 

 general map of Burma, on the same scale, has also been completed. New 

 Railway maps have been prepared. The helio-gravure process is making 

 good progress and is being largely utilised in various ways. 



Trans. -Frontier and other Geographical worh. The year has been 

 comparatively uneventful in geographical work in the countries border- 

 ing India, though several parties of explorers have been busily engaged 

 about the Pamir and eastwards towards Tibet. 



French Gochin- China, &c. The Proceedings of the French Geographi- 

 cal Society contain an account of the results of the mission of Mr. Taupin 



