394 
SEVENTH REPORT—1837. 
Tasie [X.—Scotch Iron.—Muirkirk No.1, Cold Blast. 
ExrERIMENT 1, 
Breadth do. 
Distance between 
supports 4 ft. 6 in. 
et Wigs zt 
| a |eelee 
| a Be oe | 
= 95 | 8H 
| 2 Jes | Bro | 
es Seals As 
Realiae ts. 
28 | -076 
56} °150) + 
112 | :298) -013 
| 168 | -471) -030 
| 224 | -660/ -053 
| 280 | *862) -085 
336 |1:096 | +131 
| 392 |1°339 | -186 
448 |1-650 | -284 
476 |broke 
.. Ultimate de- 
flection = 1°781. 
Broke at the 
centre. 
Depth of bar, 1:015 
1:007 
EXPERIMENT 2. 
‘Depth of bar, 1:049) 
|Breadth do. 
1-025 
Distance between 
supports 4 ft. 6 in. 
é s ms 
fucose 
= | 2o/;/ SE 
~ a 5) 
— 32 oe Fa 
of a. ow 
2 A As 
=e A ) 
28 | -067| ... 
56 | *133| + 
112 | -267|-010 
168 | -42] | -027 
224 | -589 | -049 
280 | -767 | 077 
3836 | -961 | +111 
392 |1:177 |-159 
448 |1-420 | -227 
476 |1:554 
483 |broke 
.. Ultimate de- 
flection = 1°583. 
Broke at the 
centre. 
EXpERIMENT 3: 
Breadth do. 
Distance between 
supports 2 ft. 5 in. 
A S 
el gee 
2 |) Oem ists 
Poy eos o 
E}A [As 
112 | -035 
224 | -076 | 
336 | +117 + 
448 | -160 | -007 
560 | +206 | :010 
672 | -250 | -018 
784 |-309 | -029 
896 |°377 | 045 
952 | +410 | 
1008 |broke! 
.. Ultimate de- 
flection = °440. 
Broke 4 an inch 
EXPERIMENT 4. 
—— 
Depth of bar, 1°013)|Depth of bar, 1°042 
1°003|| Breadth do. 
1°025 
Distance between 
supports 2 ft. 3 in. 
Deflection in 
inches. 
Deflection, 
Load removed, 
| Weight in lbs. 
| 
.. Ultimate de- 
flection = 412. 
Broke = of an 
inchfrom the cen- 
from the centre. 
tre. 
The Muirkirk No. 1 cold blast, isa remarkably fine soft iron, with large, open, 
- and brilliant crystals, of a blueish grey colour ; it presents great regularity in its cry- 
stalline structure, the crystals slightly diminishing in size as they recede from the cen- 
tre. In its working properties, as well as appearance, it is much akin to the Elsicar 
and Low Moor irons, and from its fluidity and strength may be safely used for every 
purpose of casting. 
Results reduced to those of bars 1:00 inch square. 
Product 
Specific Modulus of Breaking Ultimate bX d, or 
ravity. elasticity weight | deflection} power of 
8 in lbs, (6). (@. resisting 
impact, 
ns i oat bar 4ft.6in- 1) 7959 | 14050600 | 4588 | 1-808 | 8295 
Experiment 2nd bar Aft 61) ruzy_ | ra0seso0 | 4382 | 1860 | n08 
Mean...| 71138 | 14003550 | 443:5 1-734 7701 
Experiment 3rd, bar 2ft. 3) os eeceseeseeeee 9793 | -4457| 436-5 
in. between supports ...... [70000 
Experiment 4th, bar 2f. 3) od seeeseeens 8806 | +4293} 3780 
in. between supports ...... f [0 
Meatiscdlidccoseiulintewted etwowed 929-9 4375 | 407-2 
