A ROOF BOLTING MACHINE IS SHOWN IN THE CENTER OF THE PICTURE IN A NEW MINE OF THE TENNESSEE CONSOLIDATED COAL COMPANY NEAR JASPER AND CHATTANOOGA. THE SELF-PROPELLED MACHINE HAS A DRILL THAT BORES HOLES IN THE CEILING OF THE SHAFT AND AUTOMATICALLY SCREWS FOUR TO FIVE FOOT BOLTS WHICH ACT AS BRACES TO KEEP THE ROOF OF THE SHAFT FROM FALLING. AT THE RIGHT IS A YELLOW BRATTON (CANVAS) USED TO CHANNEL FRESH AIR INTO THE MINE

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