Reduced to the uniform Measure of One Inch Square, and one Foot in Length: Weigt suspended from one End.

MATERIALS.

Breaking weight.

Value for general use.

METALS.

Lbs

Cast iron, American

means of four divisions of

507

125 to 160

822

155 " 210

733

180 " 210

772

192 " 210

" mean by Maj. Wade

681

170 " 225

" West Pt. Foundry,

980

250" 825

" English, Low Moor, cold blast....

472

110 " 140

" Ponkey, cold................

581

145 " 190

" hot blast, mean......

500

125 " 165

"cold " " ........

S16

130 " 170

"Ystalyfera cold b't

770

195 " 255

" mean of 65 kinds.....

600

125 " 165

" mean of 15 kinds, direct from the Pig, cold blast.......

641

160 " 21.1

"planed bar...............

518

130 " 170

" rough bar....................

534

133 " 175

Steel, greatest..................

1918

330 " 450

Steel, puddled (permanent bond).........

WOODS.

800

170 " 225

Ash.........................

168

55

Beech.........................

130

32

Birch.........................

160

40

Chestnut.........................

160

53

Deal, Christiana........

137

45

Elm.............................

125

30

Hickory.........................

250

55

Locust.........................

295

80

Maple.........................

202

65

Norway pine..............

123

40

Oak, African...................

208

50

" American white

230

60

" " live...

245

65

" Canadian................

116

36

" Dant

122

30

" Eng ..............

140

35

" " superior

188

45

Pitch pine.................

136

45

" "

100

50

Riga fir...........................

94

30

Teak.....................

206

60

White pine.................

92

30

" American

130

45

Whitewood......................

116

88

MATERIAI.S

Breaking weight.

Value for general use.

Lbs

WROUOHT IRON.

American.................

700

650

60 to 209

600

English..................

400

100 " 130

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

650

135 " 180

Swedish*......................

665

165 " 210

MIXTURE OF CAST AND WROUGHT IKON, etc,

Cast iron, Blaenavon.

...

145

" 10 per ct. of wr't

...

175

" 30 " "

...

230

" 50 " "

...

185

" and 2½ per ct, of nickel, mean

.....

180

" Stirling, 2d qu.

...

154

" " 3d "

...

125

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

...

55

Brass...............................

...

68

stones (American).

Flagging, blue...............

31.

10

Freestone, Conn.........

18.

4

" Dorchester

10.8

3½

" N. Jersey

20. 1

6½

17.8

6

N. York.....

24.

8

Granite, blue, coarse..

18.

6

" Quincy. Mass.

26.

8½

stones (English).

Adelaide marble...........

4Z

1½

Arbroath..................

17.

5½

Bangor slate...................

90.

30

Bath.............................

5.2

1¾

Caithness, paving, Sc.

68.

•22

Cornish granite...............

22.

7

Cralglelh sandstone...

10.7

3½

Darley sandst., Vict'a

1.8

4

Kentish rag...................

35.8

12

Limestone....................

11.

3½

Llangollen slate.........

43.

14

Park Spring sandst'e

4.3

1.4

Portland oolite..............

21.2

7

Valentla, paving, Irel.

68.5

23

Welsh,

157.

55

Yorkshire, blue..........

26.

8½

" landing....

22.5

7½

" paving...............

10.4

3½