Cause of the explosion: Ventilating current in 5 south entry short-circuited permitting an explosive mixture of gas and air to accumulate and be ignited by an electrical arc.

The deceased:

• Charles E. Roundsley, 52
• Alexander Hay, 42
• Floyd J. Brown, 45
• Sabating Miglioini, 45
• Vittorio Filangi, 52
• Frank Bolgiani, 63