878 
ME. HODGKEXSOX’S EXPEEIMEXTAX EESEAECHES 
in the direction of the axis, as in Experiments 9 and 10. The strength in these cases 
should have been only one-thu’d of what it was in the former ones, according to the 
results in pages 855 to 857 ; but it is greater than that, in the ratio of 20 to 17 nearly, 
arising in a great measure from crushing of the plates and the ends of the pillars, 
through the weight. 
Table II. (Table I. continued). — Experiments to obtain the Strength of Solid Uniform 
Pillars of Low Moor Iron, No. 2, and of Blaenavon Eon, No. 3, the pillars being 
10 feet long and 2|- inches diameter nearly, with the ends turned flat and perpen- 
dicular to the axis. 
No. of Experiment. 
Description of Pillar, 
10 feet long, and as above. 
Deflection. 
Weight 
producing 
the 
deflection. 
Breaking 
weight, or 
weight with 
which the 
pillar sank. 
Value of X from for- 
mula 
W 
^“D3-55’ 
tvhere W is the break- 
ing weight and D the 
diameter, the length 
of the pillar being 
10 feet. 
Value of X 
from formula 
W 
j 
Remarks. ■ 
ii. 
inches. 
Solid uniform cylinder of 
Low Moor Iron, No. 2. 
Diameter from eighteen 1 2.553 
measurements f 
Weight of pillar 159 lbs. 9 oz. 
inch. 
•10 
•15 
•20 
•25 
•29 
•33 
•38 
•43 
•51 
•61 
■78 
1-23 
Its. 
20693 
25397 
34805 
37157 
39509 
41861 
.44213 
46565 
48917 
51269 
53621 
55973 
55973 
=24^99 tons. 
lbs. 
2008-9 
2105-2 
12. 
Solid uniform cylinder of 
Low Moor Iron, No. 2. 
Diameter from eighteen 1 2.539 
measurements J 
Weight of pillar 158 lbs. 15 oz. 
•10 
•13 
•16 
•19 
•22 
•25 
•28 
•35 
•39 
•45 
•55 
•67 
•79* 
20693 
25397 
30101 
34805 
37157 
39509 
41861 
44213 
46565 
48917 
51269 
53621 
55973 
55973t 
= 24'99 tons. 
2048-5 
2146-1 
1 
* See note to Experiment j 
2, which applies to the 
cases below marked 
with an asterisk. 
+ After bearing the weight 
55973 lbs. for half a 
minute or more, it sank. 
13. 
1 
1 
Solid uniform cylinder of 
Blaenavon Iron, No. 3. 
Diameter from eighteen 1 2.559 
measurements J 
Weight of pillar 1 60 ibs. 3 oz. 
•10 
•13 
•16 
•20 
■25 
■34 
•42 
•55 
•66 
•90 
1-00* 
20693 
25397 
30101 
34805 
39509 
44213 
48917 
51269 
53621 
55973 
56914 
56914 
=25-41 tons 
2034-1 
2131-8 
14. 
1 
Solid uniform cylinder of 
Blaenavon Iron, No. 3. 
Diameter from eighteen 
measurements J 
Weight of pillar 159 lbs. 6 oz. 
•07 
•11 
•14 
•17 
•21 
•28 
•37 
•43 
•54 
•74 
•90* 
20693 
25397 
30101 
34805 
39509 
44213 
48917 
51269 
53621 
55973 
57855 
57855 
= 24-83 tons 
2096-7 
21970 
1 
