Index. 
Mill for grinding dry colours, 452. H 
Morris, on cleaning silk, woollen, and J 
cotton goods, 236. 
Mortlock’s easy method of surveying, j 
263. 
Moult’s apparatus for filtering water, 
32. 
Mule, foal produced from, by inter- 
course with a stallion, 240. 
N. 
Nankeen colour, on the process for dye- 
ing, 435. 
Nature, instrument for making correct 
drawings from, 265. 
Nystrom, on preparing and applying 
amber varnish, 406. 
O. 
Oak bark, substitutes for, in tanning, 
423. 
Oil, to purify, for chronometers, 187. 
on the edulcoration of fish, 333. 
rapeseed, to purify, 348. 
Optigraph, description of, 198. 
Ovals, an instrument for delineating, 
201 . 
R. 
Rail- ways, some account of, 28. 
Rawlinson’s mill for levigating painters* 
colours, 456. 
Ribancourt’s receipt for writing ink, 48. 
Richardson’s process for cleaning fea- 
thers, 233. 
S. 
Saddler, on refining lead, 463. 
Sage, on giving to copper the grain and 
hardness of steel, 415. 
Saltpetre, French method of purifying, 
209. 
Saponaceous liquor, for domestic use, 
66. — Note. 
Sarjeant’s cheap engine for raising wa- 
ter, 38. 
Screwpress, with an expanding power, 
373. 
Sea log and sounding machine, descrip- 
tion of, 111. 
Serres, on chemical printing, 203. 
Shagreen, on the mode of making at 
Astracan, 309. 
Sheepfold, an improved one, 365. 
Ships, mode of driving copper bolts into, 
180. 
P. 
Painters’ pannels, method of preparing, 
272 . 
Patents, list of American, 154, 237, 318. 
English, 77. 
account of the method of ob- 
taining, 274. 
Patent bedstead, description of one, 
283. 
Pallas, on making grained parchment, 
or shagreen, 309. 
Parry, on the decay of wood, and its 
prevention, 298, 321. 
Patterson’s composition for weather 
boarding, 208. 
Perspective instrument, for drawing 
from nature, 201 
an useful scale for divi- 
ding the vanishing lines 
of, 255. 
description of an instru- 
ment for drawing in, 
258. 
Phillips’ method of driving bolts into 
ships, 180. 
Plowman, on an improved sheepfold, 
365. 
Siphon, description of Argand’s valve, 
20 . 
Smith’s mode of raising a loaded cart 
when the shaft horse has fallen, 34. 
Sneyd, on preserving seeds in a state 
fit for vegetation, 124. 
Soap of wool, method of making, and 
its use, 66. 
suds, used as a manure, 289. 
Stilton cheese, method of making, 152. 
Straw, on its use in strawberry beds, 
292 
Sunflower, account of its uses, 22. 
Surveying, easy method of, 263. 
Swedish stone paper, or artificial slate, 
experiments on, 133. 
T. 
Tanning, substitutes for oak bark in, 
423.' 
Tarry’s memoir on writing ink, report 
on, 43. 
Telegraph, Coxe’s description of a re- 
volving, 99- 
Theatres, plan for an improved, 350. 
on the construction of, 353, 
379. 
Porcelain painting, on the use of plati- 
na in, 439. 
Portfolios, on making large ones, 362. 
Puzzolana, discovery of a factitious, 241. 
on natural and artificial, 250. 
Thenard, on the purification of rape- 
seed oil, 348. 
and Lussac’s memoir on ve- 
getable and animal analy- 
sis, 49. 
