Fires from oil and incendiary bombs can be extinguished with ordinary Portland cement, says Dr. Roy Cross, president of the Kansas City testing laboratory, who considers it superior to pitch, recently suggested as an extinguisher for incendiary bombs. It has put out fires successfully where water, carbon tetrachloride, foam and similar substances failed. Furthermore, it gives off no injurious gases and is in itself not combustible. Portland cement is readily available and can be stored in kegs wherever there may be danger of fires.