546 
PROFESSOR J. A. EWING ON EXPERIMENTAL 
Pianoforte Steel Wire, Normal Temper, Plate 58, fig. 11. 
h 
96. 
/*. 
h. 
96. 
96. 
•§. 
95. 
0 
76 
- 4-37 
11,510 
27-30 
-j- 3,590 
+ 7-80 
12,020 
4-40 
230 
- 7-80 
10,850 
31-20 
4,300 
15-60 
12,240 
7-80 
460 
59 
-15-60 
8,580 
35-20 
7,830 
31-20 
12,690 
15-60 
1,540 
99 
-23-40 
3,380 
39-16 
10,i90 
39-00 
12,950 
23-40 
4,320 
185 
-31-20 
- 4,115 
46-80 
12,080 
46-80 
13,230 
31-20 
7,770 
249 
-39-00 
- 9,810 
54-60 
12,950 
62-40 
13,720 
39-00 
10.630 
273 
—46"80 
-12,000 
62-56 
13,490 
78-16 
14,170 
46-88 
12,110 
258 
-62-48 
-13,520 
78-00 
14,170 
91-89 
14,510 
54-60 
12,920 
237 
-78-00 
-14,220 
92-20 
14.590 
62-40 
13,490 
216 
-91-57 
-14,590 
70-20 
13,890 
198 
70-04 
14,360 
78-00 
14,200 
182 
-70-20 
-14,320 
46-80 
13,820 
91-66 
14,590 
159 
—46'SO 
-14,010 
31-20 
13,330 
-31-20 
-13,520 
15-60 
12,840 
70-20 
14,300 
—15"60 
-12,950 
7-80 
12,400 
46-80 
13,840 
- 7-80 
-12,550 
0 
11,850 
31-20 
13,440 
0 
-11,970 
15 60 
12,870 
+ 7-S0 
-11,070 
7-80 
12.420 
15"60 
- 9,020 
0 
11,850 
23*40 
- 3,250 
§ 29. Plate 59, fig. 12 shows the behaviour, under corresponding variations of mog- 
netising force, of a piece of pianoforte steel wire of the some quality and dimensions as 
the above, after it had been annealed by heating to bright redness and cooling slowly. 
The following figures apply to the first application of «§ :— 
Pianoforte Steel Wire, Annealed, Plate 59, fig. 12. 
4?. 
96. 
0 
-31 
_ 
4-99 
(initial) 
398 
80 
7-80 
895 
115 
11-70 
2,010 
172 
15-66 
3,585 
229 
19-50 
5,220 
268 
23-40 
6,750 
289 
27-30 
8,040 
295 
31-20 
9,090 
291 
35 - 26 
9,900 
281 
39-00 
10,530 
270 
43-06 
11,110 
25S 
46"88 
11,520 
246 
54-60 
12,300 
225 
62 - 56 
12,920 
207 
70-28 
13,390 
191 
7S-47 
13,850 
176 
91-73 
14,400 
157 
