If there 's a hole in a' your coats, I rede ye tent it; A chiel 's amang ye takin' notes, And, faith, he 'll prent it.
Robert BurnsBurns' Hog-Weighing Method: (1) Get a perfectly symmetrical plank and balance it across a sawhorse. (2) Put the hog on one end of the plank. (3) Pile rocks on the other end until the plank is again perfectly balanced. (4) Carefully guess the weight of the rocks.
Robert Burns