OF IRON BEAMS. 527 



nition of erect and on their side immediatelv 

 before the first experiment on beams.) 



In expt. 28, c = 4- X T = 10.5366 x ^ = 494.4 



In „ 29, imperfect. 



In „ 30, c = ^x^ = 10.5366 x^ = 571.4 



In „ 31, c= „ =10.5366x1^2=484.3 



In „ 32, c= „ =10.5&c.x2x^-^ = 489.0 



In „ 33, c= „ = 10.5&c.x^-^ = 531.4 



The mean from these values of c, to produce 

 cwts. in beams cast on their sides, is = 514.1. 



68. We will now take an approximate view 

 of what error there will accrue, in each of 

 the experiments above, by adopting these mean 

 values of c. Calling then 535.9 and 514.1, 

 536 and 514 respectively, we have as below. 



Real yalne Mean valae Krror in 



Ezperiaient. or r, from for c Difference. parts of 



last article. Sobtracted. breaking wts. 



1 

 TV 



1 

 TO 



12 - - 545 - - 536 - - 9 



15 - - 545 - - » - - - 9 • 



18 - - 512 - - „ 24 • 



19 - - 558 - - „ - - - 22 ■ 

 <( 20 - - 507 - - „ 29 ■ 



21 - - 596 - - „ 60 • 



23 - - 558 - - „ 22 - 



24 - - 472 - - „ 64 - - tV 



L26 - - 529 - - „ 7 - _ y^ 



I 



IT 



r 



1 



T 



