Will Saltpeter Explode ? Improved Smut Machine. Concrete Houses. INVENTORS MILLWRIGHTS EARNERS &ND IdANUFACICURERS. SCIENTIFIC AMERICAN. 94 which the dirt can fall out when the machine stops or there is weight enough of dirt behind regular current of air through the ma chine. The arrows show the direction of TOBINS' SMUT MACHINE. MeAVOY'S REFRIGERATOR., 1859-04-23

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Will Saltpeter Explode ? Improved Smut Machine. Concrete Houses. INVENTORS MILLWRIGHTS EARNERS &ND IdANUFACICURERS. SCIENTIFIC AMERICAN. 94 which the dirt can fall out when the machine stops or there is weight enough of dirt behind regular current of air through the ma chine. The arrows show the direction of TOBINS' SMUT MACHINE. MeAVOY'S REFRIGERATOR., 1859-04-23

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