398 SEVENTH REPORT—1837. 
TasBLe XI. 
Table of deflections as exhibited with permanent weights of 
280 lbs. suspeaded 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 in- 
tervals of time. 
Distance between supports 4 ft. 6 in. 
| ExpERIMENT 1. Ss ExpERIMENT 2 
—_— * au — 
Coldblastiron No.2 & &  ||Hot blast iron No. 2) 
Depth of bar, 1°050) 3 > . |\Depth of bar, 1°050 
Breadth de. 1°050) 5 § |'Breadth do. 1°010 
) 3 3 &é ar a . 4 
i gldelezl 3 |88i & | eel ofl | 
Slezies| = |eel s (Seles 
= co.) 5 =] oS es 3's o& 
= o Ox Q = PH] Fa | ee 
& | BA) ES 5 ‘o | 38/55 | 
2 | gs|ag a | 2 |€e|Az 
EF i6s8|7A]| 1897. ack tire 
BGO FAG see sili 'wevesenany, |laetns 56 | °153 | .... 
112} -309 |) *020 3) cnisis. oe. Alpentscs 112 | -337| 022 
IGE 499 WP ec dess csssnems [coum 168 | 548]..... 
224°) +708 |°075 || .....006. | sence 224 | -784| -088 |The permanent weight, 
280 |-916 |*108 || March9th | 49° || 280 |1-043| -182 || 2801bs. was fixed sta- 
280 |-930 | ... || Do. 11th)...... || 280 |1-064|...... || tionary upon the cold 
280 | -932 | ... Do. 17th) ...... 280 |1:067 |...... || blast bar at 6 o’clock 
| 280 | -930 | ... || April 15th) 47 |) 280 {1-078 |...... || p.m., March 8th 1837, 
| 280 |-932 | ... || May 3st; 62 || 280 |1-082)...... and an equal weight 
| 280 | 937 |... || Aug. 22nd) 70 | 280 /|1-086|...... || wasleftto remain up- 
; 280 | -942 | ... || Nov. 18th) 45 || 280 |1-083]......|) on the hot blast bar 
| 280 | 941 | ... || Jan.8,1838) 38 || 280 |1-086)...... on the following day 
| 280 |-945 |... || March 12th| 51 | 280 |1-091| ...... at 10 a.m. 
; 280 | 968 ane | June 23rd} 78 || 280 |1:107|...... From observations taken 
ee a SEPP A Fen EE ee a |e ee a eS ee RG Sy rai hy |: 
| the mean deflection for 15 months was found to be, for cold blast -936, increase 
004, for hot blast, 1:079, increase *012. 
I 
Results in the preceding Table, showing the progressive and 
increased ratio of deflections from March \\th, 1837 to June 
23rd, 1838. j 
Cold Blast Iron Hot Blast Iron Sdbze 
deflection in ’| Date of Obset- | Temp.| “deflection in | Ratio of increase 
ah as) vation, } inhties of deflections. 
1-684 March 11th, 1837)|......... 1 ci a Wi an aae 
1-824 June 23rd, 1838|| 78° 1107 | ORAL See 
|_——$ | --+—_—— Penns OEE See) Were. Pare 
| 033 | Increase hddivabs 043 1000 : 1303 
