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57 fluid drams (ʒ) is about one-and-one-third times as as a Billiard Ball.
In other words, it's 1.3595031055901 times the of a Billiard Ball, and the of a Billiard Ball is 0.73556286549706 times that amount.
(American-style, WPA specifications)
Per the World Pool-Billiard Association, a billiard ball weight must weigh between 40.104166666667 fluid drams (ʒ) and 43.75 fluid drams (ʒ). According to legend, the difficulty in obtaining elephant ivory for the manufacture of billiard balls in the 19th century inspired the search for a replacement material, which led to the development of the first industrial plastic.
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Click here to see how other things compare to 57 fluid drams (ʒ)...