hydraulic cement

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Chapter 4 pg 42 - Chapter header of The Adventures of Tom Sawyer by Mark Twain. Published in 1884 by The American Publishing Company

Periods of American Literature

Martin Luther King Jr., and his wife, Coretta, lead off the final lap to the state capitol at Montgomery, Alabama on March 25, 1965. Thousands of civil rights marchers joined in the walk, which began in Selma, demanding voter registration rights

Why Is Black History Month Celebrated in February?

Groups of depositors in front of the closed American Union Bank, New York City. April 26, 1932. Great Depression run on bank crowd

Causes of the Great Depression

Eye. Eyelash. Eyeball. Vision.

7 Vestigial Features of the Human Body

Mona Lisa, oil on wood panel by Leonardo da Vinci, c. 1503-06; in the Louvre, Paris, France. 77 x 53 cm.

Why Is the Mona Lisa So Famous?

The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.

What If the President Is Impeached?

Encyclopaedia Britannica First Edition: Volume 1, Plate XXXVIII, Figure 2, Ark, Ark of the Covenant, a small chest, coffer, contains Aaron's rod, manna pot, tables of covenant, Schechinah, Divine Presence, oracle, shittim-wood, acacia tree

Where Is the Ark of the Covenant?

hydraulic cement

construction

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major reference

In cement
…under water, are often called hydraulic cements. The most important of these is portland cement.
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