...specifications, and therefore the limestone to be used in Portland cement manufacture should earn- not over 5 to 6 per cent, of magnesium carbonate. Though magnesia...magnesia is present, is still a pure carbonate rock. With the impurities to be discussed in later paragraphs, however, this is not the case. Silica, alumina,...

...specifications, and therefore the limestone to be used in Portland cement manufacture should carry not over 5 to 6 per cent, of magnesium carbonate. Though magnesia...magnesia is present, is still a pure carbonate rock. With the impurities to be discussed in later paragraphs, however, this is not the case. Silica, alumina,...

...specifications. Therefore the limestone to be used in Portland cement manufacture should not carry over 5 or (5 per cent of magnesium carbonate. Though magnesia is...magnesia is present, is still a pure carbonate rock. With the impurities to be discussed in later paragraphs, however, this is not the case. 8ilica, alumina,...

...carry over 5 or 6 per cent of magnesium carbonate. Though magnesia is often described as an "impuritj'" in limestone, this word, as can be seen from the preceding...magnesia is present, is still a pure carbonate rock. With the impurities to be discussed in later paragraphs, however, this is not the case. Silica, alumina,...

...than the 45.65 per cent of dolomite are usually described simply as more or less imnure magnesites. Though magnesia is often described as an " impurity...magnesia is present, is still a pure carbonate rock. With the impurities to be discussed in later paragraphs, however, this is not the case. Silica, alumina,...

...therefore the limestone to be used in Portland cement manufacture should carry not over five to six per cent of magnesium carbonate. Though magnesia is...present, whatever its amount, simply serves to replace an e(-]uivalent amount of calcium carbonate, and the resulting rock, Aether little or much magnesia is...

...than the 45.65 per cent of dolomite are usually described simply as more or less impure magnesites. expresses the facts in the case. The magnesium carbonate...magnesia is present, is still a pure carbonate rock. With the impurities to be discussed in later paragraphs, however, this is not the case. Silica, alumina,...

...described as an "impurity" in limestone, this word, as can be seen from the preceding statements, hardlv expresses the facts in the case. The magnesium carbonate...whether little or much magnesia is present, is still u pure carbonate rock.. With the impurities to be discussed in later paragraphs, however, this is not...

...than the 45.65 per cent of dolomite are usually described simply as more or less impure magnesites. I expresses the facts in the case. The magnesium carbonate...calcium carbonate, and the resulting rock, whether lit^e or much magnesia is present, is still a pure carbonate rock. With the impurities to be discussed...

...magnesites. The presence of much magnesia in finished Portland cement is considered undesirable, 31/2 per cent, being the maximum permissible under most...magnesia is present, is still a pure carbonate rock. With the impurities to be discussed in later paragraphs, however, this is not the case. Silica, alumina,...