180 Reports and Proceedings — Geological Society of Lonaon. 



copper, and lead exist in small quantities ; iron, molybdenum, and' 

 bismuth are met with, but none of these metals can be worked 

 at a profit. The alluvial gold-bearing deposits are now nearly 

 exhausted ; the author considers this gold to have been derived 

 originally from the quartz-porphyry. The alluvial gravels have 

 also yielded diamonds. 



With the view of ascertaining if any clue could be found to the 

 relative age of the various sedimentary rocks in Borneo, and for 

 comparison with the eruptive rocks in other parts of the East Indies, 

 the author undertook a thorough investigation of the structure of 

 the various igneous rocks, tuffs, and breccias present in the region, 

 and a detailed description, extending to 160 pages, is given of their 

 microscopical characters. To facilitate comparison, 120 admirably 

 rendered microphotographs representing the principal types of 

 these rocks are given in a sepai'ate cover. The author has arranged 

 them under the following groups: — (i) Basalt; (ii) Andesite; 

 (iii) Propylite ; (iv) Diabase-diorite ; (v) Biotite-diabase with 

 hornblende or olivine ; (vi) Uralite and Epidiabase ; (vii) Normal 

 Diabase, undoubtedly Triassic ; (viii) Diorite, Norite, and Gabbro ; 

 (ix) Quartz-porphyry; (x) Granite and Quartz-diorite; and also 

 (xi) Breccias of eruptive rocks. 



Further, we may mention the Atlas of 12 carefully-drawn and 

 coloured geological maps and sections and one plate of fossils. 



Mr. Wing Easton and his coadjutors merit our congratulations 

 on bringing their arduous labours involved in the preparation of 

 this work to a successful conclusion. 



i^ZEZPOK-TS -A-isriD I=I^oc:E]E;IDI3S^C3-s. 



Geological Society of London. 



L— February 17th, 1905.— J. E. Marr, Sc.D., F.R.S., President, 



in the Chair. 



Annual General Meeting. 



The Reports of the Council and of the Library and Museum 

 Committee for the year 1904 were read. After premising that the 

 Society continues to be generally in a flourishing condition, the 

 Council stated that there had been a small decrease in the number 

 of Fellows during 1904. The total accession of Fellows in the 

 course of the twelve months under review was 44. During the 

 same period, the losses by death, resignation, and removal amounted 

 to 53. The total number of Fellows on December 31st, 1904, 

 was 1,251. 



The balance-sheet for that year showed receipts to the amount of 

 £3,187 3s. M. (including a balance of £192 6s. \\d. brought 

 forward from the previous year), and an expenditure of £2,777 16s. 2d. 



The completion of vol. Ix and the commencement of vol. Ixi of the 

 Society's Quarterly Journal was announced. 



