Is anyone aware of any specific units of measure for the glass industry?
To get the ball rolling, English:
A table of glass is 5 feet.
45 tables is a case
Except for Newcastle and Normandy glass in which case 25 tables make a case.
A square (of windows) is not square and a sash window is made up of 12 or 18 squares.
Leaded windows have lights.
(Source: Hoppus's Practical Measurer; or Measuring Made Easy, Halifax 1883)