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...ways and proportions, many possible raw materials. Obviously, too, we might expect to find perfect gradations in the artificialness of the mixture, varying...the one extreme, where a natural rock of absolutely conect composition was used, to the other extreme, where two or more materials, in nearly equal amounts,...

...possible raw materials. Obviously, we, too, might expect to find perfect graduations in the artificialncss of the mixture, varying from the one extreme where...more materials, in nearly equal amounts, are required to make a mixture of correct composition. The almost infinite number of raw materials which are theoretically...

...proportions, many possible raw materials. Obviously, we, too, might expert to find perfect graduations in the artificialness of the mixture, varying from...more materials, in nearly equal amounts, are required to make a mixture of correct composition. The almost infinite number of raw materials which are theoretically...

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...too, we might expect to find perfect gradations in the artificialness of the mixture, varying from one extreme where a natural rock of absolutely correct...more materials, in nearly equal amounts, are required to make a mixture of correct composition. The almost infinite number of raw materials which are theoretically...

...degree of artificialness of such a mixture, varying from the one extreme where a natural rock of almost absolutely correct composition was used to the other...where two or more materials in nearly equal amounts were required to produce a mixture of correct composition. The almost infinite number of raw materials...

...too. we might expect to find perfect gradations in the artificialness of the mixture, varying from one extreme where a natural rock of absolutely correct...more materials in nearly equal amounts are required to make a mixture of correct composition. The almost infinite number of raw materials which are theoretically...

...artificialness of the mixture, varying from the one extreme, where a natural rock of absolutely coricct composition was used, to the other extreme, where...more materials, in nearly equal amounts, are required to make a mixture of correct composition. a Discussions of the materials and method of Portland cement...

...ways and proportions, many possible raw materials. Obviously, too, we might expect to find perfect gradations in the artificialness of the mixture, varying...the one extreme, where a natural rock of absolutely cornet composition was used, to the other extreme, where two or more materials, in nearly equal amounts,...