J

Jefferson, Ellis, and Galloway, Messrs. Patent for a machine
for finishing, glazing, and glossing leather,
Jewell, Mr. Joseph. Patent for a method of preparing calo-
mel for medicinal use,

K

Page

145

79

King, Mr. Robert. On the construction of the teeth escape-
ments, 210; his improvements in Graham's dead-beat, 375

L

Laudanum, its efficacy as a remedy for the bats or gripes in

horses,

321.323

242

Lead, white, patent for a new method of making it,
Leather, patent for a machine for finishing, glazing, and

Lester, Mr. William. Patent for an improved rotary motion, 364
Lewis, Mr. J. Letter on Le Caan's improved tram-plates for
rail-roads,

390

Life-preserver, description of one to secure persons from
sinking in water, 310; testimonies in favour of this
apparatus,

M

312

61

Malt, Report of the Committee of the House of Commons
on the rate of duty payable on it,
Mangling, patent for a machine for performing that operation, 162
Mathew, Daniel Dering, Esq. Patent for improvements in

the construction of watches and chronometers,

73

Matthews, Mr. W. Recipe for making family wine,

47

Morris, Mr. John Shorter. Patent for a machine for man-

gling, 162; observations on it,

164

Mortar, description of one for preparing mercurial oint-

-

373

ment, 306; observations on that contrivance,
Murdoch, Mr. William. Account of the application of the
gas from coal to economical purposes,
Music, patent for a method of facilitating the learning of it, 83

262

N Nails,

N

Page

366

Nails, patent for a new method of making them,

Newberry, Mr. William. Patent for machinery for sawing

wood, splitting or paring skins, &c.

Noble, Mr. Edward Moore. Patent for a new method of
making white lead,

Oak timber, questions proposed by the Commissioners of
Naval Revision respecting the state of it, and answers
to them,

31

244

274

Oil, method of extracting it from the seed of the poppy,

166

Opium, on the culture of white poppies for the purpose of

Oxalates, their composition, 345; decomposition of them, 348

Oxalic Acid, observations on it,

P

Paper, patent for making it by means of machines,

337.394

Parry, Dr. Enquiry into the causes of the decay of wood,

and the means of preventing it,

Patents, monthly list of them,

217

50. 93

71. 142. 215. 286. 359. 416

Patten, patent for an improved one,

350

Phelps, Samuel, Esq. Patent for improvements in manufac-

turing soap,

246

Philips and Lee, Messrs. Observations on the combustion of

gas from coal at their cotton-manufactory,

262

Phoenix, Mr. James. Description of a mortar for preparing

mercurial ointment,

306

34

Plowden, Francis, Esq. Patent for apthartic viands,
Poppy, remarks on its cultivation for the benefit of its oil,

109; soil fit for the purpose, 118; kind and quantity

of

of seed, ibid.; time of sowing and weeding, 119; har-
vest, 165; mode of extracting the oil, 166; expenses,
produce and profits, 168. 355; on its culture for the
preparation of opium, 323; mode of preparing a de-
coction from it for the cure of colds and coughs,
Potash, on the properties and nature of its basis, 131; on
the proportion of the peculiar base and oxygen in it,
180; on the relations of its base to other bodies,

Ꭱ

Page

324

186

Rail Roads, description of improved tram-plates for them, 388
Ross, Capt. His letter to Mr. Boswell relative to the ship

Economy,

252

Rotary Motion, patent for a mode of producing one, 36;
patent for an improved one,

364

Sails, account of improved ones for vessels of all descrip-
tions, 253; reports relative to their advantages

Salts, on super-acid and sub-acid ones

Shepheard, Captain, his report on Captain Cowan's sails
Sheppard, Captain, Letter on Captain Cowan's sails,
Ships, method of throwing a rope on shore from them when

255

409

255

256

in distress, by means of a shell from a mortar,
Skins, Patent for machinery for paring or splitting them,
Smoke, Patent for a machine for discharging it from smoking
chimnies,

315

31

157

Soap, Patents for improvements in manufacturing it, 246.362
Soap-suds, account of an experiment on them as a manure, 119
Soda, on the properties and nature of its basis, 175; on
the proportion of the peculiar base and oxygen in it,
180; on the relations of its base to other bodies,
Speechly, Mr. Recommends the watering of vines with
soap-suds as a remedy against insects,

186

Stedman, Mr. John. Patent for a patten and clog,
Stuart, Capt. J. Letter on Capt. Cowan's sails,

Sykes, Capt. Certificate respecting Capt. Cowan's sails,

123

370

257

256

T Tar,

T

Tar, on the use of it for cattle swelled with eating clover,
Thomson, Dr. On oxalic acid,

Page

321

337.394

213

259

388

Threshing-machine, description of one made by Mr. Frost,
Tide-mills, description of an improvement on them,
Tram-plates, description of improved ones for rail roads,

V

Vancouver, Mr. J. Letter on Le Caan's improved tram-

plates for rail roads,

Virginia Fly, account of its ravages among corn,

W

389

376

43

Water, cheap apparatus for filtering and purifying it,
Watson, Mr. John. Patent for improvements in soap-making, 361
Weeks, Mr. Edward. Patent for a forcing-frame for raising

fruits which require artificial heat,
Wheat-moth, account of it,

Wheel Carriages, improvements on them, 306; on the means

81

376

of giving the same intensity of pressure to their wheels, 328
Willers, Mr. George. Letter on Mr. Daniel's life-preserver, 312
Williams, Mr. Samuel. Patent for improving machinery for

spinning wool, cotton, hemp, &c.

Williams, John, Esq. His account of a method of hasten-

ing the maturation of grapes,

200

Wilmore and Tonks, Messrs. Patent for a new method of

Wollaston, Dr. W. H. On super-acid and sub-acid salts,
Wood, enquiry into the causes of its decay, and the means

patent for machinery for sawing it,

50.93

31

Wool, patent for improved machinery for preparing and
spinning it,

1

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