Paddle-wheels, experiments with 79 Poole's patent 186 205, 218, 244 1 tents Patents, expired list of Painting on leather, parchment, &c. on plate glass Palmer's patent iron roofs 201 Winan's patent car- 164 Paper-making, Dickenson's pa- ing 203 Rifle, American, for sharpening scythers 237 194 207 Perkins's patent for propelling Planing machine, American pa- tent Plates, Morgan's patent tinned 132 Pintles and braces, Lihou's pa- Rogers's patent anchors Rogers and others patent knife 231 Plating copper, French patent 203 125 3 4 128 267 16 Pianofortes, Stewart's patent Salmon's patent improved malt- 37 improvements 196 Salt, American patent for pre- Plumbago, prepared, used as a paring 208 Sawing boards, American patent Plough, American patents 287, Porter's patent iron heels for boots 36 Ploughs, notices of Mr. Green's patent mode of heating 231 Poole's patent machinery for Shawls, British cashmeer 73 |