ON THE STEENGTH OF PILLAES OF CAST lEON. 
Experiment 2. 
Cylindrical Pillar, Old Park Iron, No. 2. 
Mean diameter from eight admeasurements 2'503 inches. 
Weight of Pillar 150 lbs. 13 oz. = 150-812 lbs. 
Decrements of length, 
inch. 
•084 
•098 
•111 
•124 
•138 
•152 
•166 
•194 
lbs. lbs. lbs. lbs. 
Whence 150-812 : 150 : : 55032 : 54736=reduced breaking weight. 
Weights laid on. 
Deflections. 
lbs. 
inch. 
20693 
— 
25397 
•07 
30101 
— 
34805 
•09 
39509 
•12 
44213 
•18 
48917 
•30 
53621 
•78 
55032 broke it. 
It broke exactly 
Experiment 3. 
Cylindrical Pillar, Blaenavon Iron, No. 2. 
Mean diameter from eight admeasurements 2-486 inches. 
Weight of Pillar 148 lbs. 7 oz. =148-437 lbs. 
Weights laid on. 
Deflections. 
Decrements of length. 
lbs. 
inch. 
inch. 
20693 
— 
•046 
25397 
— 
•059 
30101 
— 
•073 
34805 
•02 
•086 
39509 
•09 
•098 
44213 
•15 
•112 
48917 
•30 
•128 
53621 
•72 
•156 
55032 sank. 
Not broken. — 
— 
lbs. 
Whence 148-437 
lbs. lbs. lbs. 
: 150:: 55032; 55611; 
= reduced breaking weight. 
895 
6 a2 
