IN BEAMS SUBJECTED TO TEANSVEESE STEAIN. 
475 
No. 6. .^ 77205-3-0564 x18750 ^^4^^5 
^ 1-3512 
No. 7. .- 90000-3-2227 Xl8750 _^p^4n 
^ 1-5059 
No. 8. 7905-1-734x 18750 
^ -2601 
No. 9. <p= 7110-13867 X 18750 
^ -23541 
No. 10. (p= 6735--12519 X 18750 _i^Q23. 
^ -25039 
Mean value of (p=16573. 
Eatio oifio p, as 1 to -847. 
If we use the following experiments of Mr. Hodgkixson’s on the breaking weight of 
inch bars, of which the tensile strength was ascertained by direct experiment, the follow- 
iag results are obtained : — 
Description of iron. 
Transverse 
strength 
of the bar, 
54 inches 
bearing. 
Tensile strength 
per inch 
of the metal. 
Computed 
value of Ip*. 
Ratio of /to Ip. 
Carron iron No. 2, cold blast 
lbs. 
476 
lbs. 
16,683 
lbs. 
14,582 
1 to -874 
Carron iron No. 2, hot blast 
463 
13,505 
15,999 
1 to 1-185 
Carron iron No. 3, cold blast 
446 
14,200 
14,617 
1 to 1-029 
Carron iron No. 3, hot blast 
527 
17,755 
14,621 
1 to -824 
Devon iron No. 3, hot blast 
537 
21,907 
14,. 393 
1 to -657 
Buffery iron No. 1, cold blast 
463 
17,466 
13,358 
1 to -765 
Buffery iron No. 1, hot blast 
436 
13,434 
14,588 
1 to 1-086 
Coed-Talon iron No. 2, cold blast 
413 
18,855 
9,732 
1 to -516 
Coed-Talon iron No. 2, hot blast 
416 
16,676 
11,347 
1 to -682 
Low Moor iron No. 3, cold blast 
467 
14,535 
15,528 
1 to 1-066 
Mean 
464 
16,502 
14,076 
1 to -853 
These results indicate that the ratio between the resistance of tension and the resist- 
ance of fiexm’e varies in different qualities of metal, and this supposition appears con- 
firmed by other experiments on rectangular bars, given in the ‘ Eeport of the Commis- 
sioners on the Application of Iron to Eailway Structures.’ The mean result, however, 
accords nearly with that of my own experiments, and shows that the resistance of 
flexure, computed as a force evenly distributed over the section, is almost nine-tenths of 
the tensile resistance. 
Employing this ratio of the values of/ and and applying it to the equations result- 
* The sign 0 was employed in my former paper to indicate the difference between the tensile force and 
the apparent resistance at the outer fibre. It is here used as the measure of the resistance considered as 
aHing evenly over the surface ; hence the value of 0, as here employed, will be two-thirds of the difference 
between the tensile resistance and the apparent resistance at the outer fibre in the rectangular bar. 
3 Q 2 
