82 SECTlOiSIAL ADDRESSES. 



in the Colonies. During the dry and tornado seasons of the year the 

 geologists are engaged on geological surveys and examinations of various 

 kinds in the Colonies, but during the rainy season field work is suspended 

 and the staffs return to England. In these respects their organisation 

 differs from that of the other Colonies. The specimens of rocks and con- 

 centrates collected are then examined and distributed for various modes 

 of treatment, and reports not made or completed on the Coast, as well as 

 microscopic examination of thin sections of rocks, are done in London. 

 The greater portion of the chemical work, such as assays and analyses, 

 devolves upon the Imperial College of Science and Technology and the 

 Imperial Institute under special arrangements. 



The field work comprises mainly the geological mapping of areas, 

 detailed surface and underground surveys of mining fields, detailed and 

 rapid surveys of special areas and deposits, and such other matters as are 

 indicated in another section of this address. 



Sudan. — Owing to the geological character of the country the discoveries 

 made by the Sudan Geological Survey are of non-metallic substances. 

 They comprise valuable limestone deposits and underground water- 

 supplies, while great assistance has been given in connection with sites for 

 wells, tanks, dams, and buildings, and advice on building materials, 

 fireclays, manufacture of salt, and other matters. 



Tanganyika. — The energies of the Tanganyika Geological Survey, a 

 young one, have been devoted very largely towards mapping certain areas, 

 examining deposits of minerals found in the country, and reporting on 

 geological aspects relative to railway location. Besides, much valuable 

 advice and assistance have been given in various directions in connection 

 with water-supplies. 



Nyasaland. — The Geological and Mineral Surveys discovered large 

 deposits of bauxite, and of limestone ; also seams of coal and lignite, 

 and deposits of asbestos, graphite, talc, tinstone, silver-lead, iron, 

 and several other minerals. Owing to these discoveries a prospecting 

 company has been formed with a view to examining the country thoroughly 

 for minerals. Valuable work has been done in connection with the dis- 

 covery of water-supplies in various districts, and most useful reports 

 published. 



Federated Malay States. — The energies of the Federated Malay States 

 Survey have been devoted chiefly to the exploration of large areas 

 with allimal and lode tin, the determination of the character and age of 

 certain intrusive rocks and limestone deposits, reports on mineral deposits, 

 advice on road metal, sites for dams and roads, schemes for boring and 

 prospecting, assays of ores and minerals. 



As some of the benefits derived by Malaya from geological maps 

 and advice given by the Survey may be mentioned the extension of tin- 

 bearing country, in which dredging operations are now in progress, and the 

 prevention of certain useless schemes proposed for boring for minerals, 

 and prospecting for oil and water, thus saving much expense to the 

 Government and private interests. As an example of non-acceptance of 

 such advice may be cited a case in which nearly £20,000 was lost by a 

 syndicate through boring for oil in a raised beach of dead shells, said by a 

 tin miner to be an excellent indication of oil. 



