First, the extinguisher valve is removed and the threads and interior of the cylinder are checked for corrosion, pitting, and any other abnormalities. [29 CFR 1910.157(f)(3)] If the cylinder passes the visual inspection, it is placed into a steel chamber, which is then filled with water at normal pressure.
Updated April 17, 2017. The earliest dated printed book known is the Diamond Sutra, printed in China in 868 CE. However, it is suspected that book printing may have occurred long before this date. In 1041, movable clay type was first invented in China.
First novel in English. The following works of literature have each been claimed as the first novel in English. Thomas Malory, Le Morte d'Arthur, (written c. 1470, published 1485) William Baldwin, Beware the Cat, (written 1553, published 1570, 1584) John Lyly, Euphues: The Anatomy of Wit (1578) and Euphues and his England (1580)