English: A. The billiard spot measured from the nearest point of the face of the cushion. B. Pyramid spot. C. Centre spot. XY. Baulk line. D. Semicircle of 11½ in. radius, known as the D.
Illustration from 1911 Encyclopædia Britannica, article Billiards
This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.
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