Mine safety in coal mines, which in turn can initiate more extensive coal dust explosions. For this reason, rock dusts such as limestone dust are spread throughout coal mines to diminish the chances of coal dust explosions as well as to limit the extent of potential explosions, in a process known as rock dusting. Coal dust explosions can also begin independently of methane gas explosions. Frictional heat and sparks generated by mining equipment can ignite both methane gas and coal dust. For this reason, water is often used to cool rock-cutting sites. Miners utilize equipment strong enough to break through extremely hard
Cleveland Clinic fire of 1929 Cleveland Clinic fire of 1929 The Cleveland Clinic fire was a major structure fire at Cleveland Clinic in Cleveland, Ohio on May 15, 1929. It started in the basement of the hospital and it was caused by nitrocellulose x-ray film that ignited when an exposed light bulb was too close to the film. The fire generated poisonous gas and two separate explosions. The fire claimed 123 lives, including that of one of the clinic's founders, Dr. John Phillips. Policeman Ernest Staab was killed by the gas while rescuing 21 victims. The Cleveland Clinic is a non-profit Ohio corporation, founded in