This section is from the book "The Boy Mechanic Vol. 2 1000 Things for Boys to Do", by Popular Mechanics Co.. Also available from Amazon: The Boy Mechanic, Vol2: 1000 Things for Boys to Do.
Ordinary small staples make good substitutes for glaziers' tacks. The points of the staples should be drawn apart slightly, as shown at A, to give them a greater holding area and at the same time make them easier to drive. These points seem to hold the glass better than the regular glaziers' points, consequently the putty will not crack and loosen, and renewing is avoided. - Contributed by Edward Sieja, Chicago.
Ill: Double-Pointed Tacks, or Staples, with the Points Spread, Used as Substitutes for Glaziers' Points