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.
The device illustrated is for making embossed letters on show cards, signs, post cards, etc. A small bulb, such as used on cameras, is procured, also the spout from a small oilcan. The bulb is fastened to the spout as shown.
Ill: The Oilcan Spout Is the Reservoir to Hold the Paint, and the Bulb Produces the Air Pressure
The material for use in the pencil is quick-drying mucilage thickened with flake white. If some special color is desired, tint the mixture with aniline. Fill the spout with the mixture and attach the bulb. Squeeze the bulb gently while forming the letters, then dust over with bronze, and allow to dry.