Measuring Time In Beer (C/N)

During their dig in Snakewater,Montana, Alan Grant and Ellie Sattler measured time in beer. They started digging in June of that year with One Hundred cases of beer, and by the time Bob Morris arrived, Grant believed that they were at sixty cases. Although Ellie corrected him, stating that it was actually sixty-three cases, indicating that Grant may have lost track of time somewhat.

Jurassic Park by Michael Crichton, page 33 (Thirty-Fifth Reprint,First Edition)