ON STRENGTH AND PROPERTIES OF CAST IRON. 
395 
TasBuLE X.—Muirkirk No.1 Pig Iron, Hot Blast. 
ExrERIMent 1. 
Depth of bar, 1:015 
Breadth do. 1:010 
Distance between 
supports 4 ft. 6 in, 
Weight of bar 5 ft. 
long. 
Deflection in 
inches. 
Deflection, 
Load removed, 
: | Weight in lbs. 
‘079 
160 
326 | « 
507 |° 
700 | « 
909 | « 
1:14] 
1-428 |: 
1571 
broke 
.. Ultimate de- 
flection = 1°668. 
Broke 23 inches 
ExrERIMent 2. | 
Depth of bar, 1025 
Breadth do. 1°035 
Distance between 
supports 4ft. 6in. 
Weight of bar 5 ft. 
long. 
é |g .% 
a |ge|as 
2 |s2/3868 
Ba |}3e]er 
a ee 
pia |P8 
28 | 069! ... 
56 | 144) + 
112 | -287)-011 
168 | :445 | -021 
224 | +610] -036 
280 | :780| -059 
336 | :978 | 090 
392 |1:190 | -1385 
420 |1:310 
448 |broke 
.. Ultimate de- 
flection = 1°412. 
‘Depth of bar, 1-020 
ExpERIMENT 3. 
Breadth do. 1:020 
Distance between 
supports 2ft. 3in. 
3 a Pe 
ga /2°e 
2 /22\38 
oOo ~ 
# |e |3¢ 
= |A qi 
112 043° a 
224 | :090 | 005 
336 | -138 | -008 
448 | -185 | 010 
560 | -231 | -015 
672 | -289 | -022 
784 | 357 | -039 
812 |broke 
.. Ultimate de- | 
flection = ‘371. 
Broke $ an inch 
Broke 23 inches 
from the centre. 
EXPERIMENT 4. 
Depth of bar, 1-035 
Breadth do. 1029 
Distance between 
supports 2.ft. Zin. 
cf a 
e ja |fs 
112 |-037 |... 
224 |-073| + 
336 | -112 | -005 
448 | +152 | -008 
560 |-190 |-O11 
672 | -230 | -014 
784 |-277 | -020 
896 | -328 | -031 
952 | +354 
1008 |broke 
-o Ultimate de- 
flection = -378. 
Broke at the 
centre. 
from the centre. || from the centre. 
This iron is inferior to the Muirkirk No. 1 cold blast; it is what is technically 
called Kishie, or full of a great variety of rich crystals sparkling in the midst of a duller 
and more compact mass ; an appearance which is invariably present in irons of great 
fluidity and richness. 
In the turning and filing process it is superior to the Carron No. 2 cold blast, and 
equal in every other respect, except strength, to any of the former irons we have ex- 
perimented upon. 
Results reduced to those of bars 1:00 inch square. 
Modulus of | Breaking | Ultimat i apa 
5 odulus 0: reaking® ‘imate | 5d, 
pens elasticity weight | deflection Hee a 
EE AVL in Ibs, (0). (d), resisting 
impact. 
Experiment Ist, bar 4 ft. 6 5 , 
in. between supports ...... 6948 Tea 00 2209 | POae M75 
Experiment 2nd, bar 4 ft. 6 2. 4 t 
eros aia cele } 6959 | 18783100 | 4120 | 1447 | 5961 
Mean...| 6953 | 18294400 |} 417-9 | 1:570 656°8 
Experiment 3rd, bar 2 ft. 3 : A : 
Rather wont aint Hustonesit titer sekeas 765°2 3784 289-5 
Experiment 4th, bar 2 ft. 3 : i ‘i 
in. between supports aeasee ae So sari —_ iy a 
Mean...|  seveve aineies's 839°8 +3848 323-6 
