ON STRENGTH AND PROPERTIES OF CAST IRON. 401 
TasLe XIII. 
Table of deflections as exhibited with permanent weights of 
392 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 
of time. 
Distance between supports 4 feet 6 inches. 
EXPERIMENT 1. eg. ExprERIMENT 2. 
ae c ) eaeay 
Cold Blast Iron No.2 3 = | Hot Blast Iron No. 2 
Depth of bar, 1°030 3 3 Depth of bar, 1°050 
Breadth do. —-1°020 4 2 @ | Breadth do. 1°000 
a 2S 
o. ; co) se of ; 
Behe, ee lray Ser aswel “eae bee 
. aS = 20 Q 4 ie ors oo 
| ae > | we = Re eae | Gates 
.o0 os 2S 5 a= os Se 
5 | 28 |A& = o|g8 |AS 
= | oO J |/1857 & 1838. EL ro 4 
: ——— oe | | | | | — = 
| 56 153 | 005 56 | -150 .n99 || Lhe weight, 392 Ibs., was fixed 
112 | -334 |-022 112 | -333 | -023 : 
| stationary on the cold blast 
168 | ‘541 oo 168 | ‘551 | ... bar on Friday, March 3rd, at 
224 | -769 |-089 224 | :775 | :086|| 12 o'clock, and the same 
280 |1°013 |... 280 |1:029 | ... weight was placed upon the 
336 | 1-294 |-199 336 |1:311.| -188}) hot blast bar at 11 o’clock, 
392 |1:616 |-292 392 | 1-635 | -272|| a.m., on the following day. 
392 | 1-684 March 6th ple 392 |1:715 Barsesuiette fone i 
1:69 : e deflection and defects o 
Ee eee ee 
{ eflection had increased in 
a Pat ye rth 47° = thee the cold blast from 1°616 to 
392 |1-725 May 3ist| 62° || 392 |1-775 EN tid ibe ie ha ga ie 
1°661 in the hot blast. 
392 | 1:737 Aug. 2nd 70° 392 | 1-783 Mean deflection throughout all 
392 | 1-724 ae 18th} 45° || 392 | 1-773 the changes of temperature 
1838. in 15 months— 
392 | 1-722 Jan. 8th] 38° || 392 | 1-773 For the cold blast 1°742, in- 
392 | 1-801 March 12th} 51° |} 392 | 1-784 crease 048; hot blast 1-777, 
392 | 1-824 June 23rd} 78° || 392 | 1-803 Increase *014. 
23rd, 1838 
Cold Blast Iron, 
Hot Blast Iron, 
Results in the preceding Table, showing the progressive and in- 
creased ratio of deflections from March \\th, 1837, to June 
detcwion in| Def er | rap,| “detecion tn” | Raina irae of 
1-684 March 6th 1837 ||......... PGMs cee is, ue a ee 
1-824 June 23rd 1838 |} 78° WSS see keh ee 
140 Increase. _||......... 088 1000 : 628 
VOL. vi. 1837. 2D 
