INSTRUMENTS USED IX ENGINEERING LABORATORIES. 



425 



,r J 1 p 1 t- •*. IT 2540.200.10000 on oor^ i •. •,!• . 



Modulus of elasticity E= — >7n<.o o.^o.n — = 20,890 kilos per sq. millimetre. 



794-2.306-2 



; 13,249 tons per sq. inch. 



Results of Tensile Tests made with Rod K. 



Diameter 



Area of Section 



Measured Length (length between marks) 

 Apparatus used for measuring elongation 

 Temperature of room .... 



<Z=: 19 millimetres. 



F = 283-5 square millimetres. 



L = 200 millimetres. 



Mirror Apparatus by Martens. 



;; = 17° Centigrade. 



Modulus of elasticity E= 1270.200.100^0 ^ 21,061 kilos per sq. mm. 



283-5. 425-4 



= 13,373 tons per sq. in. 



