Figure 49.-Snapper, after jumping off moving motor, stumbles over loose coal in roadway and is run over by motor.

Figure 50.-Roadway is clean. Snapper jumps off moving motor on wide rib side. He uses electric cap lamp. He is a careful man and will not be injured.

Snapper: Don't jump off in front of moving motor.
Boss: Don't let roadway get dirty.

Figure 51.-Snapper runs ahead of trip to throw old-type switch placed in the open. He uses hand lamp. His jacket is not inside his overalls, nor does he wear a one-piece suit.

Figure 52.-Snapper, after he throws switch, runs forward to catch motor, trips over switch, and falls with his arm across the rail. His arm is cut off.

Figure 53.-Switch handle is on narrow side of haulage road and on the same side as trolley wire and feed wire. Slack, pieces of timber, and waste clutter the haulageway.

Figure 55.-Switch handle makes a stumbling block. Switch is on narrow side. Road is not cleared. Board left beside switch is full of nails pointing upward.

clearance made.

Figure 57.-Switch handle is on wide side and extends into hole in rib; thus it is out of the road and does not obstruct the haulageway. Switch holes are whitewashed so they stand out clear in black rib.

Figure 58.-Switch handle is on wide rib side, or brake side, and is close to rib. It does not obstruct brake side. Extension rod is properly guarded by a board cover. The rib is whitewashed back of switch so handle can be seen plainly. Spring prevents switch from remaining on dead center; also, snapper does not have to stoop to throw switch.

Boss: Set switch handles in rib or close to rib; depending on type of switch employed.