ON THE STEENOTH OF PILLAES OF CAST lEON. 
875 
Deflections, and ultimate Decrements of Length of the Cast Iron Pillars, 2^ inches 
ends turned flat and perpendicular to the axis. 
' Pillars 7 ft. 6 in. long, 
from Table IV. 
Pillars 6 feet 3 inches long, from Table V. 
Pillars 5 
feet long, from Table VI. 
Breaking 
weight. 
(B.) 
B 
C* 
Ulti- 
mate 
decre- 
ment of 
length. 
Ulti- 
mate 
deflec- 
tion. 
Breaking weight. 
(B.) 
B 
c' 
Ultimate 
decrement of 
length. 
Ulti- 
mate 
deflec- 
tion. 
Breaking weight. 
(B.) 
B 
C* 
Ultimate 
decrement of 
length. 
Ultimate 
deflection. 
100191 lbs. 
=44'73 tons. 
-229 
in. 
-228 
in. 
■56 
in. 
105365 lbs. 
=47‘04 tons. 
-217 
-225 
•51 
112438 lbs.* 
= 50-20 tons. 
•231 
•221 
102543 lbs. 
=45'78 tons. 
-219 
•245 
•69 
93135 lbs. 
=41'58 tons. 
-223 
-231 
•68 
93605 lbs. 
=41'79 tons. 
-228 
-234 
•67 
1 14320 lbs. 
= 51-04 tons. 
•279 
•277 
98309 lbs. 
=43'89 tons. 
291 
-244 
•65 
131275 lbs. 
=58-60 tons. 
•389 
•272 
87019 lbs. 
=38-85 tons. 
-280 
-254 
•92 
72437 lbs. 
=32-34 tons. 
-214 
-235 
•76 
71967 lbs. 
-208 
-222 
•59 
117612 Ibs.t 
= 52-51 tons. 
•339 
•253 
=32-13 tons. 
93622 lbs. 
= 41-79 tons. 
•342 
•264 
•4961 
•449} '‘72 
•285 1 .oog 
•308/ 
:S}'” 
135592 1 
122863 J 
Mean 129227 lbs. 
= 57-69 tons. 
•272 1 .ggQ 
•249 / 
CO 
to 
to 
oo 
1274321 
116672/ 
Mean 122052 lbs. 
= 54-49 tons. 
89371 lbs. 
=39-9 tons. 
-226 
.. 
•63 
85608 lbs. 
=38-22 tons. 
•201 
•59 
90868 lbs. 
j =40-57 tons. 
-231 
•235 
•66 
115960 lbs. 
=51-77 tons. 
•294 
•248 
* This bar had probably been reduced in strength by straightening after a former experiment upon it. 
t This result is probably less than it ought to be, as too large a weight was laid on at once. 
The results hitherto given are principally deduced from the experiments in the eight 
following Tables. 
