 | New Jersey Geological Survey, New Jersey. State Geologist - Geological surveys - 1904 - 716 pages
...reached at the vitrifying point of the clay. Effects due to variation in the clay. — Burned clays may be of many different colors. Although the majority...iron oxide is present, 4 to 5 per cent., the brick burns red, unless much lime is also present. If only 2 to 3 per cent, are present, a buff product is... | |
 | New Jersey Geological Survey - Geological surveys - 1904 - 708 pages
...to variation in the clay. — Burned clays may be of many different colors. Although the majorityof clays contain sufficient iron oxide to burn red, nevertheless...iron oxide is present, 4 to 5 per cent., the brick burns red, unless much lime is also present. If only 2 to 3 per cent. are present, a buff product is... | |
 | New Jersey Geological Survey, New Jersey. State Geologist - Geological surveys - 1904 - 710 pages
...to variation in the clay. — Burned clays may be of many different colors. Although the majorityof clays contain sufficient iron oxide to burn red, nevertheless...iron oxide is present, 4 to 5 per cent., the brick burns red, unless much lime is also present. If only 2 to 3 per cent. are present, a buff product is... | |
 | Virginia. Division of Mineral Resources - Geology - 1905 - 682 pages
...reached at the vitrifying point of the clay. Effects due to variation in the clay. — Burned clays may be of many different colors. Although the majority...from the color of the clay, the shade that it will bum, since some bright red or yellow clays may yield a buff brick. If considerable iron oxide is present,... | |
 | Heinrich Ries - Clay - 1906 - 690 pages
...reached at the vitrifying point of the clay. Effects due to variation in the clay. — Burned clays may be of many different colors. Although the majority...iron oxide is present, 4 to 5 per cent., the brick burns red, provided the iron is evenly distributed, unless much lime is also present. If only 2 to... | |
 | Heinrich Ries - Clay - 1906 - 538 pages
...the clay. 6. Complete softening of the mass. Effects due to variation in the clay. — Burned clays may be of many different colors. Although the majority...nevertheless it is not safe to predict, from the color of the raw clay, the shade that it will burn, since some bright red or yellow clays may yield a buff brick.... | |
 | HEINRICH. RIES - Clay - 1908 - 612 pages
...the clay. 6. Complete softening of the mass. Effects due to variation in the clay. — Burned clays may be of many different colors. Although the majority...nevertheless it is not safe to predict, from the color of the raw clay, the shade that it will burn, since some bright red or yellow clays may yield a buff brick.... | |
 | Heinrich Ries - Clay - 1908 - 616 pages
...sufficient iron oxide to burn red. nevertheless it is not safe to predict, from the color of the raw clay, the shade that it will burn, since some bright red or yellow clays ma}' yield a buff brick. If considerable iron oxide is present, 4 to 5 per cent, the brick usually... | |
 | Chemistry - 1916 - 842 pages
...aluminous ones. Alkalies also appear to diminish the brightness of the iron coloration." "Burned clays may be of many different colors. Although the majority...nevertheless it is not safe to predict, from the color of the raw clay, the shade that it will burn, since some bright red or yellow clays may yield a buff brick.... | |
 | Chemistry - 1916 - 854 pages
...aluminous ones. Alkalies also appear to diminish the brightness of the iron coloration." "Burned clays may be of many different colors. Although the majority...nevertheless it is not safe to predict, from the color of the raw clay, the shade that it will burn, since some bright red or yellow clays may yield a buff brick.... | |
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Effects due to variation in the clay. — Burned clays may be of many different colors. Although the majority of clays contain sufficient iron oxide to burn red, nevertheless it is not safe to predict, from the color of the clay, the shade that it will... 