ON THE STEENGTH OF PILLAES OP CAST lEON. 
881 
Table III. (continued). 
^ S 
Description of Pillar ; each being cast 
Breaking 
weight, or 
w 
Value of from formula .g=-r^o r-> 
D'i’oo 
Value of X 
from 
^ s 
solid, 2:^ inches diameter nearly, and 
laid on. 
of length. 
middle. 
that with 
where W is the breaking weight, D 
formula 
IlemarkH. 
turned, 10 ft. long, and flat at the ends. 
which the 
:he diameter, and x the strength of a 
W 
2 
• 
pillar sank. 
rillar 1 inch diameter and 10 ft. long. 
u'j-o 
inches. 
lbs. 
inch. 
inch. 
lbs. 
lbs. 
Iba. 
13. 
Coltness Iron, No. 1. 
20693 
•065 
•05 
Edinburgh, Hot blast. 
25397 
■077 
Mean diameter from eight 1 2-516 
measurements f 
30101 
•089 
■06 
34805 
•100 
Weight of pillar 151^ lbs. 
39509 
•112 
•10 
44213 
•125 
•15 
48917 
•139 
■23 
53621 
•154 
•44 
56443 
•163* 
•57* 
56443 
2133-5 
2234-2 
14. 
Coltness Iron, No. 1. 
20693 
•068 
■04 
Edinburgh. Hot blast. 
25397 
•081 
Mean diameter from eight 1 2*496 
measurements J 
30101 
34805 
•094 
•108 
•06 
Weight of pillar 149 lbs. 10 oz. 
39509 
•123 
•16 
44213 
•139 
•30 
48917 
•155* 
. 44 * 
48917 
1902-1 
199M 
15. 
Carron Iron, No. 1. 
20693 
•070 
•03 
County of Stirling. Hot blast. 
25397 
■083 
Mean diameter from eight 1 2.506 
measurements j 
30101 
•097 
•04 
34805 
■110 
Weight of pillar 149|^ lbs. 
39509 
•124 
•06 
44213 
•137 
•12 
48917 
•154 
■27 
52210 
•166 
•38* 
52210 
2001-6 
2095-7 
16. 
Carron Iron, No. 1. 
20693 
•076 
•04 
County of Stirling. Hot blast. 
25397 
•091 
Mean diameter from 2*510 
measurements -**/ 
30101 
34805 
■104 
•116 
•06 
Weight of pillar 1494- lbs. 
39509 
■130 
•11 
44213 
•144 
•18 
48917 
•159 
•32 
53151 
•173* 
•45* 
53151 
2026- 1 
2121-6 
17. 
Blaenavon Iron, No. 1. 
20693 
•070 
South Wales. Cold blast. 
25397 
•082 
•08 
Mean diameter from eight 1 2*487 
measurements j 
30101 
•096 
•10 
34805 
•109 
Weight of pillar 150 lbs. 14 oz. 
39509 
•122 
•21 
44213 
•137 
48917 
•169 
•83 
48917 
1926-7 
2016-5 
18. 
Blaenavon Iron, No. 1. 
20693 
■064 
•03 
South Wales. Cold blast. 
25397 
•076 
•05 
Mean diameter from eight I „ 
measurements 
30101 
34805 
■088 
•100 
•07 
Weight of pillar 151f lbs. 
39509 
•117 
•16 
44213 
•130 
48917 
•154 
•60 
49858 
•159* 
•65* 
49858 
1930-5 
2020-9 
19. 
Old Hill Iron, No. 1 . 
20693 
•088 
•07 
Staffordshire. Cold blast. 
25397 
•106 
Mean diameter from eight \ 2*520 
measurements j 
30101 
34805 
•123 
•140 
•09 
Weight of pillar 1514 lbs. 
39509 
•159 
•13 
44213 
•188 
•61 
44683 
•191* 
• 66 * 
44683 
1679-5 
1759-0 
20 . 
Old Hill Iron, No. 1. 
20693 
•079 
•04 
Staffordshire. Cold blast. 
25397 
•094 
Mean diameter from eight 1 2 - 52 ^ 
measurements J 
30101 
34805 
•111 
•126 
•08 
Weight of pillar 151 lbs. 10 oz. 
39509 
•144 
•30 
44213 
•175 
•56 
45154 
•181* 
•61* 
45154 
16900 
1770-0 
