Figure 87.-Shot firer takes explosive from "powder box." Then miner will take box back to its hole in rib. Miner never touches explosive.

Figure 88.-Shot firer prepares primer. Miner never touches detonator. It is

Figure 89.-Shot firer tamps charge with clay. He uses wooden tamper.

Figure 91.-After making the second test for gas, the shot firer connects the firing wires to the lead wires of the detonator.

Figure 92.-After carrying the free ends of the firing wires to the entry, the shot firer calls warning in adjoining rooms before shooting. He never forgets the safety of his fellow workmen.

Figure 93.-After he gives warning, the shot firer attaches the firing wires to the battery and fires the shot. He is in the entry around corner of roomneck rib.

the blasted face.

Figure 95.-Shot firer, after he gets back to face, makes a third test for gas. He still carries the detonator box; he does not put it down to make danger.

Figure 96.-Shot firer inspects the face and points out to the miner loose slate that must be pulled before the miner starts to dig coal. Always take down slate when the shot firer says it is loose; he is an experienced man and knows.

Shot firer: Load and shoot hole carefully. Use only permissible explosive.

Miner: Do what the shot firer tells you, and don't load or shoot hole.