Palmer's suspension railway, 287, 340.
Paper carpets, 66.
Parallelogram on geometrical princi
ples, 73, 94.
Paris Mechanics' Institution, 431.
Patents, new, 79, 272, 304, 416, 448.
Pattison's (John) improvement on the
high pressure steam-engine,369.
Pavement, street and road, 387.
Pen, Doughty's ruby-pointed, 98, 140.
Pendulums, rules for calculating lengths
of, 188.
Percussion cannons and grenades, 329.
Perforating metals, &c., measure of
force for, 94.
Perkins' steam-rocket engine, 417.
Perpetual motion— -see Motion.
Pickett (Wm.) on constructing elec
trifying machines, 15.
Pink, dying silk, 336.
Pin-grinder's safety apparatus, 55.
Pipes, leaden, strength of, 405.
Pistons without friction, 414.
Potato-grinding mills, 373.
Printer's sheet-counter, 362,
Printing-press, Russell's improved, 161
improvement suggested in, 345.
Noah's steam, 423.
Printing index, 444.
Profit and discount, 35, 78, 84, 149.
Pug-mills, improvement in, 169
Another, 386-
Pump, single-barrel hydraulic, 51.
double, by Ozzanam, 252.
--, convenient, for houses, 311.
for
gold mines, 327.
Pyrometer, 244.
beef, cause of spoiling, 158.
Sawing timber, 86.
Scarlet colour, new, 411.
Scheffer's life-preserver, 240, 271.
Science, study of, demonstrative, 326.
Scientific miscellany, by W. Shires, 12,
Screws, cutting, 160, 166,
Scythe, Hainault, 364.
Sea levels, 111.
Secrets in selling, 347, 381, 427.
Semaphore, description of, 385.
Senhouse (Sir J.) on preventing ex-
plosions in coal-mines, 244—
Light-houses, 266.
Shakespeare (Colin), rope bridges con-
structed by, 141, 328.7
Shawl manufacture, 356.
Ships, mooring, 181.
Shipwreck, plans for saving lives from,
23, 113, 145, 216.
Shipwrights, cases of, 179, 206, 218,
298.
Shoemakers' size-sticks, 360.1-quad
Shot, improved, 364. ift +
Silks, to prevent the watering of, 69961
Sleep, why warmest in, 63.qui „sdias
Sliding-rule, use of, 130, 157, 163, 179,
227, 260, 308, 338.92
Small-pox, cure for, 444. iw
Smith (Sir Sydney), six-wheeled car. ]
riage by, 36, 353.01 91000ms
South's collimation adjustment, 387,
Speer's concentric chuck, 25.89Lİ
Spider, house, 411.
Spindles, banding, 271.93 79 wou 1979)
Sponge, new method of bleaching, 441.
Stammerers, advice to, 19.
Steam-boat, plan of, with one wheel,
Standard measures, 70, 300, 318.
65-American, 267, 446-Im-
provement in the paddles, 361-
Power for different velocities,
ker, Buchanan, yo mark, Par-
by Burstall
and Hill, 391, 433.
engines, power of, 15-Compa-
rative cost of, ib.-Connecting
190gorods of, 164192-saving of fuck
in heating boilers, 77 Improved
bucket, 207-High and low pres-
sure boilers, 374-Work of, in
drgn Cornwall, 394 Various rules,
396.
engine, Woolf's, 243, 295, 394.
--192914 900 m3 Eyes, 295
, high pressure, improve-
,by Mr. J. Pattison, 369.
Stucco images, how to varnish, 221,
303, 319, 351, 400.
Submarine forest discovered, 378.
Sugar and malt, comparative strength
of, 95, 144, 295.
Superstitious customs, 203.
Square numbers, 53.
Umbrella rings, improvement in, 111.
Vallance (Dixon) on plans to prevent
carriages from falling, 88-Con-
venient pump for houses, 311-
New applications of lever power,
Varnish for stucco images, 221, 303,
319, 351, 400-for violins, 303,
432.
manufacturers, hint to, 444.
Vessels, warping, up rapids, 1—Plan
to sail against the wind, 81.
Vision, extraordinary instance of, 50.
Warming houses, Chinese method of,
Warping vessels up rapids, 1.
Washing machine, invented by J. Arm-
strong, 17-by R. Burton, 78, 298.
box, steam, 39.
Watch keys, 79.
Water, to boil, in wooden vessels, 20-
Improved filtering apparatus, 21,
200, 280-Effect of depth on the
quality of, 95-Expansive power
of, when frozen, 186-Apparatus
for raising, 273-Resistance of,
415.
Waterfalls, value of, 375.
Water horse, 177.
mill, how to add power to, 32.
wheels, 191, 222.
churn, 296.
Watt, James, 381.
Watts' counterpoise crane, 257.
Wax-cloth, how manufactured, 88.
Way (H. B.) on cementing water and
steam pipe joints, 138.
Wedge, improvement in the form of,
Weighing-machine, spring, 158.
Wightman (W. E.) on gunnery, 95.
Wind-lathe, 350, 399.
Wire, silver and brass, netting, 382.
Wood, fire, economy in, 25.
Yule (James) on weight of carriages
in motion, 12-Description of
the danaide, 41-Machine for
cutting trellis-work, 337.
Zinc, duty on, 47.
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