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Jan 1, 1954

Jan 1, 1932

Jan 1, 1972

MR. D. HARRINGTON (U. S. Bureau of Mines) : I happen to be a member of the Safety Committee, and the men on the Committee, I believe are the ones who will find the most fault with the report; but I am absolutely not in accord with the last recommendation. (The use of the "Self-Rescuer.") I do not think it safe. I do not think you are always sure you are going to have a sufficient amount of oxygen; in fact I know there are occasions in mines when there is not enough oxygen to make a man safe in a gas mask or self rescuer. At one mine fire, workers using open oil and carbide lights experienced quick reversal of air which extinguished the lights and one of the workers having carbide light was overcome. It took about 45 minutes hard work with Sylvester method of artificial respiration to restore him to consciousness. Fortunately these men were working close to fresh air but had they been far from fresh air base and relying upon self-rescuers or gas masks they would undoubtedly have perished. I was at a mine fire in Wyoming. A bunch of men were working and the air turned on them, and if they hadn't oxygen breathing mine rescuing apparatus I think there would have been at least a half dozen men killed they would have been killed before you could say, "Jack Robinson." PRESIDENT PRYDE: I would like to ask if the self-rescuers are nut approved by the Bureau of Mines? MR. HARRINGTON: They are not; absolutely not.* Furthermore, the Bureau of Mines' Engineers have opportunities to go around in mines, and in mine cars as much as anybody else in the country, and I have in mind but one who is in the slightest degree in favor of allowing self-rescuers to go in a mine. MR. BEVAN: Mr. Chairman, I would like to ask the Safety Committee if it would be of any use to the fire boss traveling through the mine? PRESIDENT PRYDE: Mr. Chairman, I think we should finish up the discussion on the self-rescuer before we take up any other discussions.

Jan 1, 1924

Jan 1, 1973

Jan 1, 1957

Jan 1, 1970

Jan 1, 1953

Jan 1, 1975

Jan 1, 1988

Jan 1, 1957

Jan 1, 1941

Jan 1, 1928

Jan 1, 1927

Jan 1, 1964

Jan 1, 1948

Jan 1, 1951

Jan 1, 2005

Cautionary Note about Forward-Looking Statements Certain statements made by us in this presentation that are not historical facts or that relate to our future plans, expectations, events or performance are forward-looking statements within the meaning of the federal securities laws. Our actual results may differ materially from those expressed in any forward-looking statements made by us. Forward-looking statements involve a number of risks and uncertainties including, but not limited to, the risks described under the heading ?Risk Factors? in the Prospectus Supplement. All forward-looking statements are qualified by these risks and uncertainties. We undertake no obligation to update the information contained in any forward-looking statements unless required by law. All statements made by us in this presentation are further qualified in all respects by the information disclosed in the Prospectus.

Jan 1, 2007

Jan 1, 1950