750 



Prof. E. G. Coker on the 



The projected image of 0'473 in. actual width measured 

 2 ins. on the squared paper screen, and the stresses obtained 



are oiyen in the annexed table. 



Fig. 6. 



LB - Light 8/?ow/v 

 B = BLUE 



p z Purple 





Abscissae, inches. 



o .3 



a a 



is pn 



0. 



2380 

 3370 

 4060 

 4570 



016 025. 



05. 



Neutral 

 axis. 



1-5. 



2-0 



1970 at 01 

 2380 at 016 

 2480 at 0-25 



1460 



0-7 

 07 

 07 

 0-75 



950 

 1460 

 1910 



640 

 1270 

 1720 

 2730 





and a plot of" these values is shown in fig. 7. 



The position of the neutral axis has been mathematically 

 determined by Andrews and Pearson*, and its distance y§ 

 from the centre of the section has been shown to be 



^o = Po|l|(7i-77 2 )^ I -"l}, 



* Drapers' Company Research Memoirs. Technical Series. I. 1904. 



