890 
ME. HODaXINSON’S EXPEEDIE^TAX EESEAECHES 
Table VIII. (continued). 
Description of Iron, 
Crashing 
specimen. [ 
weight of 
Crushing weight per square inch 
specimen. 
Of section. 
inch. 
lbs. 
lbs. 
Portland Iron, No. 1. 
•747 
41567 
94846] 
Medium. 
•748 
•750 
41273 
42743 1 
93923 
96750 
.94802 lbs. =42-32 tons. 
•750 
41391 
93690 J 
Old Hill Iron, No. I. 
•749 
24255 
55049 ' 
Medium. 
•747 
24221 
55266 
► 54761 lbs.=24-45 tons. 
•750 
23843 
53969] 
Low Moor Iron, No. 2. 
•748 
34570 
78669 ] 
Medium. 
•748 
33511 
76260 
► 77489 lbs.=34-59 tons. 
•747 
33982 
77539 
Low Moor Iron, No. 2. 
•742 
29631 
685 '25 
Centre. 
•741 
27749 
64346 
^66407 lbs. =29-65 tons. 
•742 
28690 
66349 J 
[ 
Blaenavon Iron, No. 3. 
•737 
35511 
83241 1 
Medium. 
•737 
35746 
83792 
^ 83517 lbs. =37-28 tons. 
•737 
35629 
83517 J 
I 
Blaenavon Iron, No. 3. 
•747 
38568 
88003] 
Centre. 
•747 
34805 
79416 
76643 lbs. =34-22 tons. 
•747 
27396 
62511 J 
Second London Mixture. 
•747 
41626 
949801 
Medium. From 2.J-inch. pillar, as 
•747 
41861 
95517 
1 95338 lbs. =42-56 tons. 
all above have been. 
•747 
41861 
95517, 
I 
Second London Mixture. 
•747 
34805 
79411' 
Centre. From 2-j-inch. pillar, as 
•747 
34099 
77806 
> 78451 lbs. =35-02 tons. 
all above have been. 
•748 
34335 
78135, 
I 
Second London Mixture. 
•750 
49858 
112855' 
Medium. From I-J-inch pillar. 
•750 
48917 
110725 
y 111080 lbs.=49-59tons. 
•750 
48447 
109661. 
1 
Second London Mixture. 
•750 
41861 
94754' 
Centre. From l-|-inch pillar. 
•750 
48094 
108863 
y 104071 lbs. = 46-46 tons. 
•750 
47976 
108595 
1 
Low Moor Iron, No. 2. 
From a hollow pillar 4 inches dia- 
•420 
•422 
12415 
11944 
89610 
85395 
J- 87502 lbs.=39-06 tons. 
meter and -J inch thick. 
•421 
11592 
83273 
The height of the first two of 
these was '72 inch, and of the 
last 1'502 inch. 
Low Moor Iron, No. 2. 
From the thin ring of a hollow 
pillar about 3^ inches dia- 
meter. 
Height of specimens '53 inch. 
•298 
•300 
•298 
8010 
8255 
8115 
1 14845 ] 
116785 1 115993 lbs. =51 '78 tons. 
116350J 
Low Moor Iron, No. 2. 
From the thin ring of a hollow 
pillar about 3^ inches dia- 
meter. 
Height of specimens '53 inch. 
•297 
•296 
•296 
7905 
7555 
7345 
114105 ■) ; 
109790 1 110212 lbs. = 49'20tons.i 
106740 J i 
Of the different irons tried in the preceding experiments on pillars, whether solid or 
hollow, the external part of the casting was always harder than that near to the centre, 
and the iron of the external ring of a hollow casting was very hard, the hardness 
increasing with the thinness. Thus, in solid pillars niches diameter of Low Moor 
iron, No. 2, the crushing force per square inch of the central part was 29-65 tons, and 
that of the intermediate part near to the surface was 34-59 tons, whilst the external 
