BRONZE AND BRASS.	453
Position of Specimens in the Casting, Console Bronze.
Elongation of inch sections.
.15, .15, .16, .24* .25, .29, .29, .34* .04, .05, .07, .18*
.16, .17, .25*
.27, .32*,.22 .12, .13, .17*
.08, .15*
.15*
.20, .28*
.12, .15*
.27*,.17 .03, .08*
.06, .09*
.08, .16*
.08, .13*
. 16*,. 06
.12, .10, .10
.27, . 32*
.19, .25*
.35, .41*
.11*,.08, .05 .18, .16, .19 .41*,.30, .39
Specific
gravity.
8.402
8.370
8.276
8.368 8.380 8.385
Appearance of fracture.
Light yellow, in part golden yellow......
Light yellow.............................
Light yellow, 40 per cent; spongy, copper colored, 60 per cent.
Light yellow, dark-brown specks..........
Uniform light yellow.....................
Light yellow, with golden-yellow spots__
Light and golden yellow..................
Light yellow and lavender interspersed___
Golden and light yellow interspersed.....
Light yellow..............................
....do....................................
Light yellow and golden...................
....do...................................
Yellow and golden, with brown spots......
....do....................................
Dark copper colored and brown............
Yellow, with golden spots................
Light yellow, crystalline................
Yellow, with small dark spots.............
Golden oblique............................
Light lemon yellow........................
Uniform light yellow......................
...do..............................
Elastic limit per square inch.	Tensile strength per square inch.	Elonga- tion.	Contrac- tion of area.
Pounds.	Pounds.	Per cent.	
15,600	44,080	17.5	23.0
16,400	50,840	29.2	37.4
14 200	25,440	8.5	16.2
23,800	52,280	19.3	23.0
23,600	59,520	27.0	29.4
23,600	50,400	14.0	20.0
28,400	48,440	11.5	11.8
11,500	19,550	15.0	13.2
14.800	27,680	24.0	18.3
18,800	45,640	13.5	15.0
14,000	39,840	22.0	27.6
15,000	29,500	5.5	9.5
14,000	29,000	7.5	13.2
15,600	28,000	12.0	18.3
10,000	25,200	10.5	15.0
13,000	20,320	11.0	11.8
12,400	23,800	10.7	8.4
15,000	59,600	29.5	30.7
17,000	49,050	22.0	20.5
16,500	61,100	38.0	34.0
23,600	37,400	8.0	11.6
19,800	54,400	17.7	25.2
21,200	54,320	36.7	36.4
Description.
Console bronze, not hammered .
---do....................
---do....................
Console bronze, hammered............
....do...............................
....do...............................
Console bronze, forged...............
Elevating worm wheel, unforged.......
Cylinder head........................
Cylinder head, console bronze, unforged...
---do................................
Cylinder head, forged................
---do................................
Cylinder head, not forged............
—do..................................
Cylinder head........................
Emptying coupling, 12״ disappearing carriage.
Recoil cylinder, 12" disappearing carriage.
Inner spring center, 7" mortar.......
Recoil buffers, 6" disappearing carriage...
Recoil buffer........................
—do...............................
—do..............................
Marks.
2
1
2
3
4 6 7
6 CH