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Brugnatelli, M. New method of expeditiously obtaining
nitric ether by distillation, without external heat,

Page

142

On the conversion of fixed oils into wax, 143

Bucknal, T. S. D. Esq. On the nature of the varieties of

engrafted fruit,

C

361

Cadet, M. On the wax-tree of Louisiana and Pennsylvania, 132
Cadet and Boulloy, Messrs. Observations on M. Robert's

memoir on the inflammation of combustible bodies, 387
Calicos, patent for a method of using madder in dying them, 265
Capstan, description of an improved one,
Carbonell, M. New kind of paint proposed as a substitute

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126

373

62

for painting in distemper,
Carriages, travelling, patent for a lamp or lanthorn for them, 401
Cavezzali. Process for preparing oxyd of iron,
Cements, new method of making them for terraces, and on
the employment of liquid pitch to render them imper-
meable to water, and capable of resisting frost,
Chapman, Mr. Patent for the application of certain sub-
stances as a preservative for cordage,

Report on the advantages of his preparation

by Mr. Allen,

Chocolate, on its composition and use,

222

91

98

Clayfield, Mr. Patent for extracting lead and other metals
from regulus,

441

407

Cloth, patent for a method of manufacturing and finishing
it, of warp composed of silk, cotton, woollen, worsted,
or linen yarn, and the weft of sheep's or lamb's wool,
Cobalt, metallic, method of obtaining it perfectly pure,
Cochineal, experiments on the action of some newly-disco-
vered earths and metals on the colouring matter of it,
Coffee, patent for improvements in the apparatus for, and
mode of drying it,

Copper, on the utility of prussiate of, as a pigment,
Cordage, patent for the application of certain substances as

a preservative of it,

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Coulter, Thomas, Esq. Method of cultivating peach trees, 214
Cylinders, for steam-engines, patent for a method of boring, 321

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D

Dalton, Mr. On the heat and cold produced by the me-

chanical condensation and rarefaction of the air,

On the power of fluids to conduct heat,

Page

118

282

69

179

Darcet, M. Description of a new process of refining,
Dawson, Mr. Patent for a lamp or lanthorn for carriages, 4CI
Diseases, patent for the art of curing various kinds,
Distillation, method of correcting some inconveniences of
the inequality of the fire in that operation,
Distilling, patent for improvements in the apparatus for,
and mode of performing that operation,
Dobson, Mr. Patent for a zephyr for chasing away flies,
Dry-rot, method of securing beams when injured by it,

E

Earth, patent for one capable of being rendered a substitute

for soap,

Edelcrantz, M. Method of correcting some inconveniencies
from the inequality of the fire in distillation,
Ekeberg, M. On the properties of yttria compared with glu-
cine, and on two substances in which he has found a
new metal,

Ellis, Mr. John. Account of a method of preventing the
premature decay of fruit trees,

F

Files, patent for the better manufacturing of them,
Fire-place, common, description of improvements on it,
Fish-ponds, method of managing them,

451

9

404

346

339

456

391

212

258

436

216

-

282

Fluids, experiments on their power to conduct heat,
Fogg, T. Esq. Account of a method of improving waste land, 113
Fruit-trees, on the destructive effects of aphis and blight on

them, with observations for preventing them,
method of preventing their premature decay,
Fruit, engrafted, on the nature of the varicties of,
Fryer and Bennett, Messrs. Patent for a method of manu-
facturing and finishing cloth, the warp whereof is com-
posed of silk, cotton, woollen, worsted, or linen yarn,
and the weft of sheep's or lamb's wool,

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G

Page

Gardiner, Mr. Patent for a method of preventing grain and
seeds from receiving damage by heat,
Gas, carbonic acid, account of an apparatus for impreg-

nating water, &c. strongly with it,

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Gates, substance of an essay on hanging and fastening them, 50
Grain, patent for preventing all kinds of it from receiving

damage by heat,

Greathead, Mr. Thomas. Description of the life-boat,
Guyton, M. Observations on precipitates formed by prus-
siates in acid solutions of barytes,

H

241

409

382

183

Hadley's quadrant, description of a reflecting level for
taking altitudes on land by it,
Hamilton, Captain. Description of an improved capstan, 126
Hatchett, Charles, Esq. On the utility of prussiate of cop-

per as a pigment,

Heat, on the power of fluids to conduct it,

Hermbstädt, M. On the action of some newly-discovered

180

282

metals and earths on the colouring matter of cochineal, 64
Hides and skins, patent for improvements in tanning and
dressing them,

Hodson, Mr. Patent for new and improved processes for
preparing fossil or mineral alkali,

I

Iron, account of the method of obtaining salts of it at the
minimum of oxidation,

process of preparing oxyd of, or martial ethiops,

K

161

266

62

459

Klaproth, M. On the application of platina to porcelain,
Knight, T. A. Esq. On the effects of aphis and blights in
fruit trees, with observations for preventing them, 25
Knight, Mr. Richard. Description of an instrument for
breaking up logs of wood for fuel,

342

L Lamb-

L

Lamb-skins, patent for an improvement in the method of

preparing them,

Lamp, for travelling carriages, patent for one,
Land, waste, account of a method of improving it,
Leach, patent for a method of using madder in dying,
Lead, acetite of, on its decomposition by zinc,

patent for extracting it from regulus,

Levavasseur, Gen. Method of rendering whitewash made
with lime durable; and of making a composition to be
used as a substitute for drying oils,

-

Page

328
401

113
265

304

407

160

Level, reflecting, description of one for taking altitudes on

land by Hadley's quadrant,

183

Life-boat, description of it,

409

Linens, patent for a method of using madder in dying them, 265
Little, Rev. James. Description of a reflecting level for ta-

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king altitudes on land by Hadley's quadrant,
Logs, description of an instrument for breaking them up,

M

Madder, patent for a method of using it in dying,
Martial ethiops, process for preparing it,

Martin, Mr. Patent for improvements in tanning and dres-

sing hides and skins,

Metal, on two substances containing a new one, combined

with yttria and iron, and iron and manganese,
Mills, horizontal, patent for a method of applying the
power of wind and water to them,

Mill, an improved one, for grinding hard substances,
Mitchell, Mr. S. L. Observations on soda, magnesia, and
lime, contained in sea-water, shewing that it may be
rendered fit for washing clothes,

N

Nicholson, Mr. Patent for machinery for the better and

more expeditious manufacturing of files,
Nitric ether, new method of expeditiously obtaining it by

distillation without external heat,

183

342

265

62

I

391

13

182

352

258

142

O Oils,

Oils, drying, method of making a composition to be used
as a substitute for them,

fixed, observations on their conversion into wax,
Opium, method of obtaining the extract of it,

P

Paint, on a new kind of, proposed as a substitute for paint-

ing in distemper,

Papaw tree, chemical examination of the juice of,

Paper, patent for making and applying it to purposes for
which paper has never before been used,

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бо

143

454

373

465

406

Parker, T. N. Esq. Substance of an essay on hanging gates, &c. 50
Farmentier, M. On the composition and use of chocolate, 441
Patents, list of,
80. 159 240. 320. 399. 472

Paul, Sir G. O. Bart. Observations on the method prac-
tised for ventilating hospitals, &c. and invention for
correcting its imperfections,

268

214

436

179

Peach trees, description of a method of cultivating them,
Peale, Messrs. Improvements on the common fire-place,
Perkins, Mr. Patent for the art of curing various diseases,
Pipe, vertical, the velocity of water flowing through one,
Planche, M. On the decomposition of acetite of lead by zinc, 304
Plants, on their naturalization,

45

31

Platina, on its application to porcelain,

459

Plees, Mr. Patent for manufacturing paper, and applying

it to purposes for which paper has never before been used, 406

Porcelain, on the application of platina to it,

459

Potatoes, on the extraction of spirit from them,

229

Prussiate of copper, on its utility as a pigment,

180

Prussiates, observations on the precipitates formed by them

in acid solutions of barytes,

382

Prussic acid, experiments demonstrating its presence in
several vegetable substances,
Puymaurin, M. Method of making cements for terraces,
and on the employment of pitch to render them im-
permeable to water, and capable of resisting frost,

222

R Refining,

461

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