36 
and having been run into ingots, or bars, was subjected to 
experiment as follows : — 
Results derived from 1 inch square bars, 2 feet 3 inches 
between the supports, subjected to a transverse strain ; 
DESCEIPTION OF IRON. 
Breaking 
weight in 
lbs., 
( B. ) 
Xntimate 
deflection 
in inches. 
( D. ) 
Bower of 
resisting 
impact 
{BXB.) 
Comparative 
strength 
Blaenavon 
rcpremtg. 1000 
Expt. I. Bar D. Pure Blaenavon, No. 3 ... 
1131 
.75 
848 2 
1000 
,, II. ,, C. Blaenavon, No. 3 Nickel.. 
875 
.58 
507.5 
773 
,, III. ,, B. Pure Cast Iron, No. 1 
861 
.47 
404.7 
761 
,, IV. ,, A. Cast Iron, No. i Nickel.... 
637 
.43 
276.4 
663 
,, V. ,, E. Pontypooi, pure No. 1 
798 
.36 
292.1 
705 
Mean 
860 
.52 
465.8 
760.2 
From the above there appears to be a loss of 22 to 26 per 
cent, as compared with the Blaenavon No. 3 iron; and, in 
the next series of experiments made upon similar mixtures, 
but with perfectly pure nickel, the same indications of loss 
are apparent, but not to the same extent as in the preceding, 
as may be seen from the following results : 
DESCRIPTION OF IRON. 
Breaking 
weight tn 
Ihs. 
{ B. ) 
Deflection 
in 
inches. 
( B. ) 
BXD 
or power 
to resist 
impact. 
Bates 
strength 
J^2«10U0. 
Expt. VI. Bar F 1 without Notches 
„ VII. „ F2 „ „ 
,, VIII. „ Gr 1 with one Notch 
,, IX. ,, G 2 ,, ,, 
„ X. ,, H 1 with two Notches 
,, XI. ,, H 2 ,, ,, 
867 
989 
760 
899 
746 
703 
.316 
.380 
.331 
.410 
.286 
.290 
273 
376 
231 
368 
213 
203 
1000 ; 876 
1000 : 1000 
1000 ; 768 
1000 : 908 
1000 : 754 
1000 : 810 
Mean 
829 
.335 
280 
1000: 838 
Taking the mean of these experiments it will be observed 
that the loss of strength is not so great as in the former expe- 
riment, it being about 17 per cent., giving a ratio of 100 : 83. 
As indicated by ultimate deflection and the power to resist 
impact, these specimens are, however, inferior to those first 
experimented upon, as may be seen by the numbers in the 
ratio of 465 : 280. This, in some degree, neutralizes the 
measure of strength, in consequence of the diminution of the 
elasticity of the bars. 
At the commencement of the paper, the author stated that 
