The Naturalist in Nicaragua: A Narrative of a Residence at the Gold Mines of Chontales; Journeys in the Savannahs and Forests. With Observations on Animals and Plants in Reference to the Theory of Evolution of Living FormsJ. Murray, 1874 - 403 pages |
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Page 87
... LODES . 87 nearly vertically , excepting that they are very irregular in thickness , and often branch and send thin offshoots into the enclosing rocks ; they resemble coal seams that have been turned up on edge , so as to be vertical ...
... LODES . 87 nearly vertically , excepting that they are very irregular in thickness , and often branch and send thin offshoots into the enclosing rocks ; they resemble coal seams that have been turned up on edge , so as to be vertical ...
Page 88
... one of the latter . Besides this metallic alloy ( to which , for brevity , I shall , in the remarks I have to make , give its common designa- 1 Ch . VI . ] QUARTZ LODES . 89 tion. 88 [ Ch . VI . THE NATURALIST IN NICARAGUA .
... one of the latter . Besides this metallic alloy ( to which , for brevity , I shall , in the remarks I have to make , give its common designa- 1 Ch . VI . ] QUARTZ LODES . 89 tion. 88 [ Ch . VI . THE NATURALIST IN NICARAGUA .
Page 89
... LODES . 89 tion of gold ) , the quartz lodes contain sulphate of silver , peroxide of manganese , peroxide of iron , sulphides of iron and copper , and occasionally ores of lead . The quartz is generally very friable , full of drossy ...
... LODES . 89 tion of gold ) , the quartz lodes contain sulphate of silver , peroxide of manganese , peroxide of iron , sulphides of iron and copper , and occasionally ores of lead . The quartz is generally very friable , full of drossy ...
Page 90
... lode below that worn away . We have seen that in the decomposed parts of the lode , the gold exists in loose fine grains . During the wet season water percolates freely from the surface down through the lodes , and the gold set free by ...
... lode below that worn away . We have seen that in the decomposed parts of the lode , the gold exists in loose fine grains . During the wet season water percolates freely from the surface down through the lodes , and the gold set free by ...
Page 91
... LODES . 91 perhaps , originated the belief that auriferous lodes deteriorate in value in depth . I at one time , after having studied the auriferous quartz veins of Australia , advocated this theory which was first insisted upon by Sir ...
... LODES . 91 perhaps , originated the belief that auriferous lodes deteriorate in value in depth . I at one time , after having studied the auriferous quartz veins of Australia , advocated this theory which was first insisted upon by Sir ...
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amongst ancient animals ants Atlantic attacks beautiful beetles birds branches brook bushes butterflies carried cattle Central America Chontales colour continued couvade covered crossed dark descended dogs Ecitons epiphytes feet flowers forest fresh-water fruit glacial period glands grass green Greytown ground growing hills humming-birds Indians inhabitants insects Jinotega Juigalpa lake land larvæ leaf-cutting ants leaves Libertad lodes look maize Matagalpa Mestizos miles mines mountain mules Nahuatls natives nearly nests never Nicaragua night numerous o'clock Ocotal passed Peña Blanca plains plants probably quartz rain range reached resemblance Rio Frio river road rock rocky San Ubaldo Santo Domingo savannahs seen shrubs side slope soon Spaniards species spider steep sting stones surface tion told town trachyte travelling trees trogons tropical America valley variety vegetation veins Velasquez wasp whilst wings yellow young