British Guiana And Its Resources

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. 1.38,527 16 14 1894 (April 1 to December 31) . 110,432 4 16 Total . 631,746 19 8 These results, marvellous as they are, are BRITISH GUIANA AND ITS RESOURCES 31 rendered still more astonishing when the great physical difficulties and general sur- roundings are taken into account ; and when, too, it is borne in mind that the whole of* this output has been obtained exdusively from the washing of alluvial deposits along the banks of the smaller rivers and creeks, and that the work has been carrie
...d ou in the most primitive and unsystematic manner, by means of old-fashioned " sluices," " battels," and " toms," handled by men un- versed in gold-working, and supervised by overseers, mam' of whom are equally igno- rant and inexperienced.
These alluvial deposits appear to be im- partially distributed over almost every part of the colony, and are now being worked on nearly every tributary of the great rivers, Essequibo, Mazaruni, Cuyuni, Barima, and Demerara. The deposits lie at a depth varying from a few inches to 15 feet below the surface, which is for the most part covered by a slight layer of soil and vege- table matter ; they consist of coarse and fine sand, pebbles of quartz, quartzite and green- stone, held together by tenacious brownish yellow clay, under which are found the auri- 32 BRITISH GUIANA AND ITS RESOURCES ferous strata, varying in thickness from six inches to six feet, and beneath is a plastic clay, white or green, but generally green, in colour.


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