Substance.

For l° Fahr.

For 1° Cent.

Length = 1.

Length = 1.

Aluminium (cast)... .

.00001234

.00002221

Antimony (cryst.) . ..

.00000627

.00001129

Brass cast.....................

.00000957

.00001722

" English plate.

.00001052

.00001894

" sheet........

.00001040

.00001872

Brick, best stock. . . .

.00000310

.00000550

Bronze (Baily's). . . .

.00000986

.00001774

Copper, 17...................

Tin, 2½...........

Zinc, 1.........................

"................

.00000975

.00001755

Cement, Roman, dry.

.00000797

.00001435

Cement, Portland

(mixed), pure.........

.00000594

.00001070

Cement, Portland, mortar, with sand..

.00000656

.00001180

Concrete: cement mortar and pebbles

.00000795

.00001430

Copper...............

.00000887

.00001596

Ebonite..............

.00004278

.00007700

Glass, English flint. .

.00000451

.00000812

" French flint.. .

.00000484

.00000872

" white, free from lead.. .

.00000492

.00000886

" blown........

.00000498

.00000896

" thermometer ..

.00000499

.00000897

" hard.........

.00000397

.00000714

Granite, gray, dry. . .

.00000438

.00000789

" red "

.00000498

.00000897

Gold, pure...............

.00000786

.00001415

Iridium, pure............

.00000356

.00000641

Iron, wrought............

.00000648

.00001166

" Swedish.......

.00000636

.00001145

" cast.........

.00000556

.00001001

" soft.....

.00000626

.00001126

Lead.....

.00001571

.00002828

Marble, moist.............

.00000663

.00001193

" dry.........

.00000363

.00000654

" white Sicilian, dry.. .

.00000786

.00001415

Marble, black Galway

.00000308

.00000554

" Carrara.....

.00000471

.00000848

Masonry, of brick in cement mortar: headers..........

.00000494

.00000890

Substance.

For l° Fahr.

For 10 Cent.

Length = 1.

Length = 1.

Masonry, of brick in cement mortar: stretchers........

.00000256

.00000460

Mercury (cubic expansion)......................

.00009984

.00017971

Nickel................

.00000695

.00001251

Osmium...................

.00000317

.00000570

Palladium, pure........

.00000556

.00001000

Pewter................

.00001129

.00002033

Plaster, white................

.00000922

.00001660

Platinum.................

.00000479

.00000863

Platinum, 90 per cent. Iridium, 10 per cent................................

.00000476

.00000857

hammered and annealed...................

Platinum, 85 per cent...........

.00000453

.00000815

Iridium, 15 per cent.......................

Porcelain........................

.00000200

.00000360

Quartz, parallel to major axis, t 0° to 40° C............

.00000434

.00000781

Quartz, perpendicular to major axis, t 0° to 40° C........

.00000788

.00001419

Quartz, cubic expansion at 16° C......

.00001924

.00003463

Silver, pure.............

.00001079

.00001943

Slate..............

.00000577

.00001038

Steel, cast..........

.00000636

.00001144

" tempered.....

.00000689

.00001240

Stone (sandstone), dry..............

.00000652

.00001174

Stone (sandstone),

Rauville............

.00000417

.00000750

Stone (sandstone),

Caen..................

.00000494

.00000890

Tin................

.00001163

.00002094

Wedgwood ware.....

.00000489

.00000881

Wood, pine............

.00000276

.00000496

Zinc...............

.00001407

.00002532

Zinc, 8...........

.00001496

.00002692

Tin, 1............