NOVEMBER 23 Bn the Manufacture of Phosphoric Acid and of certain Phosphates. The Macropode. Beware of Green Wan Papers. 0-41 IMPROVED MOP. HEAD. APPARATUS FOR EXTINGUISHING SPARKS One of the Errors of the Age. A Meteor in Arkansas., scientific american, 1872-11-23


NOVEMBER 23 Bn the Manufacture of Phosphoric Acid and of certain Phosphates. The Macropode. Beware of Green Wan Papers. 0-41 IMPROVED MOP. HEAD. APPARATUS FOR EXTINGUISHING SPARKS One of the Errors of the Age. A Meteor in Arkansas., scientific american, 1872-11-23


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