 This operation is performed for the space of a quarter of an hour, the water then begins to run clearer. Having washed the earthy particles away, the gravel-like matter is raked up to the end of the trough ; after the current flows...  Travels in South America - Strana 327podľa William Bingley - 1820 - Počet stránok 346Úplné zobrazenie - O tejto knihe
 | 1812 - Počet stránok 1020
...pounds •weight of cascalhao. The water being then let in upon it, the cascalhao is spread abroad and continually raked up to the head of the trough,...constant motion. — This operation is performed for the space of a quarter of an hour j the water then begins to run clearer, having washed the earthy... | |
 | John Mawe - 1812 - Počet stránok 422
...eighty pounds weight of cascalhao. The water being then let in upon it, the cascalhao is spread abroad and continually raked up to the head of the trough,...in constant motion. This operation is performed for the space of a quarter of an hour; the water then begins to run clearer, having washed the earthy particles... | |
 | 1812 - Počet stránok 532
...cascalhuo. The water heing then let in upon it, the cascalnfio is spread abroad and continually raked tip to the head of the trough, so as to be kept in constant motion. This operation is performed for the space of a quarter of an hour ; the water then begins to run clearer; having washed the earthy... | |
 | Anonymous - 1812 - Počet stránok 512
...head of the trough so us to be kept in constant motion. This operation is performed for the space of a quarter of an hour; the water then begins to run clearer. Having washed the earthy particles •way, the gravel-like matter is raked up to the end of the trough... | |
 | 1813 - Počet stránok 818
...eighty pounds weight of casralhao. The water being then let in upon it, the cascalhao is spread abroad and continually raked up to the head of the trough,...in constant motion. This operation is performed for the space of a quarter of an hour; the water then begins to run clearer, having washed the earthy particles... | |
 | 1813 - Počet stránok 702
...head of the trough, fo as to be kept in confiant motion. This operation is performed for the fpace of a quarter of an hour; the water then begins to run clearer, having wafned the earthy particles away, the gravel-like matter is raked np to the end of the trough... | |
 | 1813 - Počet stránok 706
...head of the trough, fo as to be kept in conitant motion. This operation is performed for the fpace of a quarter of an hour; the water then begins to run clearer, having wafhed the earthy particles away, the- gravel-like matter is raked up to the end of the trough... | |
 | Rev. Edward Polehampton, John Mason Good - 1818 - Počet stránok 566
...water being then let in upon it, the cascalhao is spread abroad and continually raked up to the iiead of the trough, so as to be kept in constant motion. This operation is performed for the space of a quarter of an hour ; the water then begins to run clearer ; having washed the earthy... | |
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