...The production is grouped as follows : Type 1 includes cement produced from a mixture of argillaceous limestone ("cement rock") and pure limestone. This...at several western plants. Type 2 includes cement made from a mixture of comparatively pure limestone with clay or shale. This mixture is employed at...

...materials from which it is manufactured. Type 1 comprises cement produced from a mixture of argillaceous limestone ("cement rock") and pure limestone. This...Lehigh district of Pennsylvania and New Jersey and at a few western plants. Type 2 comprises cement made from a mixture of comparatively pure limestone...

...rock") or from a mixture of cement rock with pure limestone. Under this type of manufacture are included all the cement plants of the Lehigh district of Pennsylvania and New Jersey and a few plants in certain other states. Type 2 includes cement made from a mixture of comparatively pure...

...plants reported the use of oyster shells and clay in the output, which is included in type 2. Type 3 includes cement manufactured from a mixture of marl and clay. This type of mixture has been used in certain plants in Michigan, Ohio, Indiana, New York, Utah, and Virginia, and in 1929...

...-15.2 -18.9 -8.8 ol oyster shells and clay; the output of these plants is included in type 2. Type 3 includes cement manufactured from a mixture of marl and clay. This type of mixture has been used in certain plants in Michigan, Ohio, Indiana, New York, and Virginia. Type 4 includes...

...The production is grouped as follows : Type 1 includes cement produced from a mixture of argillaceous limestone ("cement rock") and pure limestone. This...district of Pennsylvania and New Jersey, and also at a few western plants. Type 2 includes cement made from a mixture of comparatively pure limestone with...

...The production is grouped as follows : Type 1 includes cement produced from a mixture of argillaceous limestone ("cement rock") and pure limestone. This...district of Pennsylvania and New Jersey, and also at a few western plants. Type 2 includes cement made from a mixture of comparatively pure limestone with...

...produced from a mixture of argillaceous Umestone ("cement rock")and pure limestone. This is thecombination of materials used in all the cement plants of the...district of Pennsylvania and New Jersey, and also at a few middle and western plants. Type 2 includes cement made from a mixture of comparatively pure limestone...

...a mixture of argillaceous limestone ('' cement rock ") and pure limestone. This is the combina tion of materials used in all the cement plants of the Lehigh district of Pennsylvania and New Jersey and at a few western plants. Tjrpe 2 comprises cement made from a mixture of comparatively pure limestone...

...raw material used in its manufacture. Type 1 includes cement produced from a mixture of aigillaceous limestone ("cement rock") and pure limestone. This is the combination of materials used in nil the cement plants of the Lehigh district of Pennsylvania and New Jersey, and also at several western...