ON STRENGTH AND PROPERTIES OF CAST IRON. 
of time. 
TABLE XIV. 
Table of deflections as exhibited with permanent weights of 
448 lbs. suspended from the centre of bars of cold and hot 
blast Coed-Talon iron, cast to be one inch square, and left to 
determine the effect produced on each bar after given intervals 
Distance between supports 4 feet 6 inches. 
403 
ExrErIMENt 1. 
Cold Blast Iron 
No. 2. 
EXPERIMENT 2. 
——a 
Cold Blast Iron 
No. 2, 
Depth ofbar 1-000 | Depth of bar 1:020 
Breadth do. 1:010 
Deflection, 
Load removed. 
Weight in lbs. 
Observed deflec- 
tion in inches. 
. 
336)1-262 | 
392/1:556 
448/1-904 
448}1-964 
448/2-005 
448/2-005 
448/2-010} ... 
448 2-014 broke 
aftér sustaining the 
load 37 days. 
The deflection in- 
creased from 1°904 
ito 1°964 after the 
defects of elasticity 
were last taken. 
404 
Breadth do. 1:050 
Deflection, 
Weight in lbs. 
Observed deflec- 
tion in inches. 
Load removed. 
pie 
Dm 
S: 
578 |-039 
754)... 
336} -934 |-087 
8392/1131] ... 
448}1°361 |-192 
448}1-410 
448/1-413 
448)1-413 
448/1-413 
448|1-422 
448}1-424 
448}1-438 
448/1-431 
448/1-430 
448/1:439 
448)1°457 
Date of Observation. 
‘Temperature. 
1837. 
March 6 
ves WO 49° 
1] 
17 
15| 47° 
31] 62° 
22! 70° 
18) 45° 
Jan. 8} 38° 
March 12) 51° 
June 23} 78° 
Cold Blast Iron, | 
sie Date of Obser- 
cs aa bse vation. | Temp. 
Experiment 5. 
1-410 March 6th, 1837. 
1-457 June 23rd, 1838.|| 70° 
047 Increase 
oe 
2D2 
EXPERIMENTS. 
Hot Blast Iron 
No. 2. 
Depth ofbar 1:040 
Breadth do. 1:010 
tion in inches. 
Deflection, 
Load removed. 
Weight in lbs. 
Qhaeeved fefea: 
So. 
: Boe 
- oe 
168} °579| . 
224) -829 |-086 
DSO owas. 
336/1°419 |-208 
3892 broke with 
this weight. 
Hot Blast Iron, 
deflection in 
inches. 
seen ene eeenerenee 
Remarks. 
The permanent weights, 
448 \bs., were placed, in 
experiment J, upon the 
cold blast bar on Satur- 
day, the 4th March, at 
4 o'clock p.m., 1837, 
and the same weights 
became stationary on 
the cold blast bar, in 
experiment 2, on the 
previous day, at 4 
o'clock p.m. 
‘In experiment 3, 392 lbs. 
broke the bar; several) 
other bars of hot blast 
were tried, but they suc- 
cessively broke on lay-| 
ing on the weights, 448 
bs. 
‘Mean deflection for 15 
| months, ending 23rd 
| June, was for cold blast 
1-431, increase 0°28. 
Results in the preceding Table, showing the progressive and in- 
creased ratio of deflections from March Gth, 1837, to June 
23rd, 1838. 
Ratio of increase 
of deflections. 
seen e eee eeeneereee 
