M. Buffers.
N. Set thumbscrew to fasten on the tender.
O. The lamp.
P. Tap, used to ascertain the quantity of water in the boiler.
R. S. Hand rail.
To all locomotives there are three principal parts, the frame work, or carriage, the engine, or cylinders, and parts connected with them, and the boiler.
Our model shall be a fifteen inch one.
Laying out Materials
is the next thing in order. First we want a sheet of brass for the bed plate, 1/16th of an inch thick, cut 4×14 inches, and be sure to cut the corners square. (See Figure 3.)