Paddle-wheels, experiments with 79

Poole's patent 186
American pa-

205, 218, 244

1

tents
Parr and Bluet's patent motion
Patents, descriptive report of
those recently enrolled 1, 5,
17, 33 to 41, 65 to 72, 121 to
125, 161 to 168, 193 to 200
Patents sealed, list of, 32, 64, 96,
128, 160, 192, 224, 256, 288
Patents, American specification
of
274 to 282
Patents, evidence on the law of
before a Select Committee of
the House of Commons 113,
149, 173, 251

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-
tent

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-
kilns

37

improvements

196

Salt, American patent for pre-

Plumbago, prepared, used as a
substitute for oil

paring

208

Sawing boards, American patent

Plough, American patents 287,
243, 244, 245

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