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Miners drill two or more holes into coal to place the explosive charges.

1. Drilling Prior to Setting Explosives

Two miners drill holes prior to placing charges. 'Holes are bored at proper intervals for shooting.'

2. Miners Drilling Holes

Two miners drill before placing charges.

3. Drilling Prior to Setting Explosives

Miner drilling a hole for explosives at the Bishop Mine, Pocahontas Fuel Co.

4. Drilling Prior to Placing Explosives at Bishop Mine, Pocahontas Fuel Company

Miner drilling holes for explosives at Jamison No. 9.

5. Drilling Prior to 'Setting' Explosives at Jamison No. 9

Miner Drilling a hole in mine.

6. Miner Boring a Hole Prior to Placing a Charge