FIRTH'S VEHICLE AXLE. IMPROVED VEHICLE AXLE. A New Cattle Disease. Drifts and Tunnels. When the vein is missed by following a wrong lead a cross THE PROJECTING PRAXINOSCOPE. An Asphalt 'Mortar. How Hogs Prevent the Re newal of Pine Forests. REYNAUD'S NEW PROJECTING PRA XINOSCOP, scientific american, 1882-12-23

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