Popular Science, new Journal of

Potash, making, Williams' patent,

Power, obtaining, for propelling cars, &c., M'Grew's patent,

Pump for feeding steam engine boilers, by C. Potts, C. E.

Quicksilver engine, Howard's,

366

427

273

ib.

Potassa and soda, mode of ascertaining their proportions when mixed,

305

272

352

302

West Philadelphia,

Rotary steam engine, Avery's remarks, &c. on

Quadrant, the

Rails, authorship of mode of setting,

Railway, Greenwich, project

pneumatic
undulating

Rail-road from the Ohio to South Carolina,

turning short curves on, Stimpson's patent,

from Hartford to Canadian line,

apparatus for transportation on canals and, Elgar's patent,

Rain, Franklin's hypothesis, notice of, by Prof. A. D. Bache,

at different elevations,

proportion of drainage to fall of

Rotary steam engine, Foster & Avery's patent,

Rutter's heat process,

286

142 bis.

R

140 bis.

437

21

141 bis.

101

174

278

428

418

106

286

427

172

279

68

S

Seeds, hulling cotton and other, Ambler's patent,

Shingle beaches, on the motions of, by H. R. Palmer, C. E.

Silk worms, rearing of, Gay's patent,

Sky, colour of, at considerable heights,

as seen from high mountains

Smelting iron, effect of velocity in blast for

Soda and potash, mode of ascertaining their proportions when mixed,
Spark arrester, A. C. Jones',

Specific gravity, and composition of glass,

Springs, Artesian wells, and spouting fountains, Arago on

Statute of brick and mortar

Canadian twin

Steam engine, experiments for safety

23

61

431

421

135 bis.

349

ib.

434

281

305

100

249

66

424

boilers, explosions of

1,73, 145, 217, 289

boat Wm. Gibbons, explosion of the boiler of

298

engine, Avery's rotary

172

engine boilers, pump for feeding, by C. Potts, C. E..

302

boat boilers, promoting safety in

372

on Mr. Perkins' suggestions regarding the explosions of

369

carriage, Hancock's

141 bis.

Steam carriages, Maudsley & Field's,
power, economy of, by F. Burr,

ib.

422

Stone planing machine, Hunter's

139

SPECIFICATIONS OF AMERICAN PATENTS.

Riding saddles-Van Horn's,

Flasks for moulding iron tea kettles, &c.-David Stewart's,

Cutting sausage meat, and stuffing sausages-Abraham and John Keagy's,
Washing and churning machine-Charles Otis',

Slide valves for steam engines-A. M. Eastwick's,
Improved stove-J. L. Mott's,

combined stove-J. L. Mott's,

Spreading India rubber upon cloth-Wm. Atkinson's,

Preparing and leaching ashes, and making potash-Elijah Williams',
Plummer blocks and slides—Baldwin's,
Destroying weevils in grain-Lee's,

Distilling spirits of turpentine-Jennings',
Improvement in public finance-Golder's,
Turning short curves upon rail-roads-Stimpson's,
Rotary steam engine-Foster and Avery's,
Rearing of silk worms-Gamaliel Gay's,
Doffer for wool carding machines-Parkhurst's,
Propelling cars, boats, &c.-Alexander M'Grew's,
Apparatus for boiling liquids-Steele's,

Apparatus for transportation on canals and rail-roads—Elgar's,
Apparatus for raising vessels-Porter's,

Machine for hulling cotton, and other seeds-Ambler's,

T

Tannate of gelatin, application of, to taking casts from medals,
Tellurium, and its compounds with oxygen,

Thames Tunnel

133

134

165

171

436

427

435

435

59

60

61

62

132

133

134

270

272

273

274

275

277

278

279

349

351

352

353

418

420

421

361

285

429

27

434

108

432

437

275

141 bis.

366

132

281

420

246

62

142

22

365

436

274

174

437

67

434

282

ib.

351
437

JOURNAL

OF THE

FRANKLIN INSTITUTE

OF THE

State of Pennsylvania

AND

MECHANICS' REGISTER.

DEVOTED TO

MECHANICAL AND PHYSICAL SCIENCE,

CIVIL ENGINEERING, THE ARTS AND MANUFACTURES,

AND THE RECORDING OF

AMERICAN AND OTHER PATENTED INVENTIONS.

EDITED

BY THOMAS P. JONES, M. D.

MEMBER OF THE AMERICAN PHILOSOPHICAL SOCIETY, OF THE ACADEMY OF NAT-
URAL SCIENCES, PHILADELPHIA, THE AMERICAN ACADEMY OF ARTS
AND SCIENCES, MASSACHUSETTS, AND CORRESPONDING MEM-

BER OF THE POLYTECHNIC SOCIETY OF PARIS.

NEW SERIES.

VOL. XVIII.

PHILADELPHIA:

PUBLISHED BY THE FRANKLIN INSTITUTE, AT THEIR HALL; KENNEDY & ELLIOTT, WASHINGTON CITY; E. I. COALE & CO.

BALTIMORE; G. & C. CARVILL & CO., NEW YORK; AND

JOSEPH H. FRANCIS, BOSTON.