No such windows were necessary in the exit doors, but to them were attached heavy galvanized iron flanges which served to cover the food receptacles.

The piston is 4 inches thick: its body is formed of brass with a cover of cast iron, and between the body and the cover two flanges, forged on the piston rod, are introduced to communicate the push and pull of the piston to the rod.

A later form of Howe's machine used a pair of angular clutches, embracing the flange of the wheel.

A.Having bored the cylinder, faced the flange, and bored out the hole through which the boring bar passes, put a piece of wood across the mouth of the cylinder, and jam it in, and put a similar piece in the hole through the bottom of the cylinder.

Now the whistle blew for our section house; the brakes gripped the flanges of the wheels, and we gathered our belongings so as not to unnecessarily delay the others, and when the train stopped we soon had our track tools piled in front of our tool house.

Pieces of wood may be interposed between the ring and the body of the piston, to keep the ring nearly in its right position; but these pieces of wood should be fitted so loosely as to give some side play, else the disposition would arise to wear the flange of the piston into a groove.