1891 Article Rock-blasting Electric Firing System Methods Machine James MAB1 EM2 This is an original 191

This is an original 191 black and white print ad for U-Bar Greenhouses from the Pierson U-Bar Company

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Period Paper is pleased to present a collection of wood engravings from The Graphic

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1891 Article Rock-blasting Electric Firing System Methods Machine James MAB1 EM2 This is an original 191This is an original 1891 one page print article "Rock blasting by Electric Firing" with four halftone illustrations of the machine and methods employed in the electric system of rock blasting; manufactured by James Macbeth and Company, 128 Maiden Lane, New York. Fig. 1 shows the holes connected in series. Fig. 2 shows the Victor Electric fuses for exploding all grades of blasting powder and high explosives. Fig. 3 shows a machine testing the battery.