...Al20j and FcjO, 20 S, MgO, Na20, KjO iiot more than 5 per cent. Lime, silica, alumina, and iron are abundantly and widely distributed in nature, occurring in different forms in many kinds of rocks. The lime is furnished by a natural limestone, either a hard limestone, or chalk, or marl, and occasionally...

...alumina (AlaC)3) and iron oxide (Fe2O3) together, the remaining 5 per cent, including any magnesium carbonate, sulphur and alkalies that may be present....mixture could be prepared by combining, in an almost infinite number of ways and proportions, many possible raw materials. Obviously, we, too, might expect...

...alumina (A12O3) and iron oxide ( Fe2O3) together, the remaining 5 per cent. including any magnesium carbonate, sulphur and alkalies that may be present....mixture could be prepared by combining, in an almost infinite number of ways and proportions, many possible raw materials. Obviously, we, too, might expert...

...(SiOa), alumina (Al,Oj) and iron oxide (FesO3) together, the remaining 5 per cent including any magnesium carbonate, sulphur, and alkalies that may be present....different forms in many kinds of rocks. It can therefore readily be seen that, theoretically, a satisfactory Portland-cement mixture could lie prepared by combining,...

...(SiOj), alumina (A12O3) and iron oxide (Fe2O3) together, the remaining 5 per cent including any magnesium carbonate, sulphur, and alkalies that may be present....different forms in many kinds of rocks. It can therefore readily be seen that, theoretically, a satisfactory Portland-cement mixture could be prepared by combining,...

...(A12O3) and iron oxide (Fe.O.,) together, the remaining 5 per cent including any magnesium rarlwnate, sulphur, and alkalies that may be present. The essential...different forms in many kinds of rocks. It can therefore readily be seen that, theoretically, a satisfactory Portland-cement mixture could be prepared by combining,...

...alumina (A12 O3 ) and iron oxide (Fe2 Os ) together, the remaining five per cent including any magnesium carbonate, sulphur and alkalies that may be present....mixture could be prepared by combining, in an almost infinite number of ways and proportions, many possible raw materials. Obviously, too, we might expect...

...alumina (A12O3) and iron oxide (Fe„ü.,) together, the remaining 5 per cent including any magnesium carbonate, sulphur, and alkalies that may be present....different forms in many kinds of rocks. It can therefore readily be seen that, theoretically, a satisfactory Portland-cement mixture could be prepared by combining,...

...(Fe2Os) together, the remaining 5 'per cent including any magnesium carbonate, sulphur, and alkalis that may be present. The essential elements which...nature, occurring in different forms in many kinds of work. It can therefore readily be seen that, theoretically, u satisfactory PortlandLehigh district....

...Portland-cement mixtures, together with a number of analyses of actual mixtures and cements, will be given. The essential elements which enter into this mixture...occurring in different forms in many kinds of rocks; and it can readily be seen that, theoretically, a satisfactory Portland-cement mixture could be prepared...