 All of the clay contained brown iron-stained streaks, but below the first 2 feet the percentage of iron-stained material is very small. For a depth of 2 feet the clay contains some organic matter, besides a considerable percentage of iron, and is very...  The Philippine Journal of Science - Seite 4201907Vollansicht - Über dieses Buch
 | United States. Philippine Commission (1900-1916) - 1901 - 608 Seiten
...iron-stained material is very small. For a depth of 2 feet the clay contains some organic matter, besides a considerable percentage of iron, and is very plastic....arroyo furnishes a pure, white clay highly prized by the workmen, which is much more plastic. Sample No. 10, taken from the largest pit on the east side... | |
 | Philippines. Mining Bureau - 1905 - 186 Seiten
...iron-stained material is very small. For a depth of 2 feet the clay contains some organic matter, besides a considerable percentage of iron, and is very plastic....arroyo furnishes a pure white clay highly prized by the workmen, which is much more plastic. Sample No. 6, taken from the largest pit on the east side... | |
 | United States. War Department - 1905 - 554 Seiten
...iron-stained material is very small. For a depth of 2 feet the clay contains some organic matter besides a considerable percentage of iron, and is very plastic....regards plasticity. Most of the* material exposed in the varioua holes possesses this valuable quality to a limited extent only, but one pit on the west side... | |
 | Philippines. Governor - 1906 - 544 Seiten
...iron-stained material is very small. For a depth of 2 feet the clay contains some organic matter besides a considerable percentage of iron, and is very plastic....arroyo furnishes a pure white clay, highly prized by the workmen, which is much more plastic. Sample No. 6, taken from the largest pit on the east side... | |
 | 1906 - 550 Seiten
...iron-stained material is very small. For a depth of 2 feet the clay contains some organic matter besides a considerable percentage of iron, and is very plastic. The firm white clay below varies greatlv as regards plasticity. Most of the material exposed in the various holes possesses this valuable... | |
 | United States. Philippine Commission, 1900-1916 - 1909 - 604 Seiten
...matter, besides a considerable iwrcentage of iron, and is very plastic. The firm, white clay beloe varies greatly as regards plasticity. Most of the...arroyo furnishes a pure, white clay highly prized by the workmen, which is much more plastic. Sample No. 10, taken from the largest pit on the east side... | |
 | United States. War Department - 1909 - 634 Seiten
...iron-stained material is very small. fiFor a depth of 2 feet the clay contains some organic matter, besides a considerable percentage of iron, and is very plastic. The firm, white clay below varies greatly ns regards plasticity. Most of the material exposed in the various holes possesses this valuable quality... | |
 | Philippines. Mining Bureau - 1905 - 184 Seiten
...iron-stained material is very small. For a depth of 2 feet the clay contains some organic matter, besides a considerable percentage of iron, and is very plastic....arroyo furnishes a pure white clay highly prized by the workmen, which is much more plastic. Sample No. 6, taken from the largest pit on the east side... | |
 | 1906 - 550 Seiten
...iron-stained material is very small. For a depth of 2 feet the clay contains some organic matter besides a considerable percentage of iron, and is very plastic....arroyo furnishes a pure white clay, highly prized by the workmen, which is much more plastic. Sample No. 6, taken from the largest pit on the east side... | |
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