ON STRENGTH AND PROPERTIES OF CAST IRON. 
TABL 
E IV. 
385 
North Wales Iron.—Coed-Talon No.3 Iron, Hot Blast. 
EXxprrIMEnt 1. Experiment 2. EXPERIMENT 3. ExrerIMENt 4. 
Depth of bar, 1:002;|Depth of bar, 1°011|/Depth of bar, 1:015)|Depth of bar, 1°017 
Breadth of do. 1:005,|Breadth of do. 1:002||Breadth of do. 1°015||Breadth of do. 1°005 
Distance between ||Distanee between /||Distance between _||Distance between 
supports, 4 ft. 6 in. || supports, 4 ft. 6 in. || supports, 2ft. Sin. |! supports, 2ft. Sin. 
Frida Ro oreareannanesst 
Se ime is | ieee a ree ae ee | a Oe = 
S Balse|l «|e Siok aati oi soil ve ee! B.8 
3 |. 20/s§ Sai SRO I i= = | Sol ss = lee.o | eS 
2 /ssie2e2] 2)/ssleei sl esiaei| 2 i|seiee 
eo |e2(S5] 2 l/es/Sg| Sl les|(Sul & |aes/ sy 
Ela (AS Sia jAsi | [AS =F la jAs 
4 H|| = 4q 4 
28 | -078 28 | :071 112 | -037 112 | -035 
56 150} -007 56 | °1438) + 224/-073 | ... 224 | -070 
112 | +296) -012 || 112 | -290/-011 || 336}-109 ; + 336 | +108 
168 | -458|-022 || 168 | -450)-026 || 448)-147 |-005 || 448/-146 | + 
224 | -621)-038 || 224 | -611)-041 560 | -182 |-006 || 560}-183 | -007 
280 | +793) -054 || 280 | -780)-060 || 672 |-221 |-008 || 672 | -220 |-009 
836 | -978|-074 || 336 | -957/-080 || 784]|-260 |-O011 || 784] -261 | -011 
392 | 1-170) -100 || 392 | 1:142]-103 || 896] -302 |-017 || 896} :°304 | -018 
448 | 1-380) -134 || 448 | 1°340)-138 || 1008 | -349 |-022 || 952)-328 | ... 
476 | 1-488 476 | 1-450 1064 | 378 1008 } -352 | -025 
504 |broke 504 |broke 1092 |broke 1064 | -380 
1120 |broke 
.. Ultimate deflec-||.. Ultimate deflec-||.-. Ultimate deflec- 
tion = 1°588. tion = 1°547. tion = °390. 
Broke $ of an inch||Broke 3 an in. from|/Broke $ of an inch 
from the centre. 
the centre. 
from the centre. 
.. Ultimate deflec- 
tion = °404. 
Broke 1 inch from 
the centre. 
The Coed-Talon No. 3, hot blast, is a much clearer iron, with larger crystals than 
the cold blast, No. 3. It presents a more varied appearance in its crystalline 
form, with the usual porosity in the centre of the fracture. The colour is more bril- 
liant than that of the last-mentioned iron. This is in many respects similar to the 
Carron No. 2, cold blast. It is reduced by the file and chisel with more ease than 
the iron last examined, 
Results reduced to those of bars 1°000 inch square. 
Product 
_p_ | Modulus of | Breaking | Ultimate | 8 x d, or 
Specific | elasticity weight deflection| power of 
gravity. | in lbs. per (6). (d). | resisting 
square inch. impact. 
Experiment Ist, bar 4 ft. 6 h t 
in. between supports vee em ae) oie a eee 
Experiment 2nd, bar 4 ft. 6 6967 p , F 
in. between supports 959 f UAGsa200) |) 402-4 peri pit 
Mean...| 6970 | 14707900 | 495-8 | 1577 | 782-2 
E iment 3rd, bar 2 ft. 3 
xperiment 3rd, F : 3 i 
Gal ciween sippatis’”, plete abs Hi 1044-0 | +3958 | 413:2 
| Experiment 4th, bar 2 ft. 3 , : 
saRetwéen supports Saades! Ml Peta 10775 | -4108 442-7 
Mea eal sere Bu ls Recanes 1060°7 | -4033 427-9 
SS Suey sa enema el wom RO: ae SRD ee Seber bee elo | 3 bade EL 
VOL, vI. 1837. zo * 
