198 Mr. A. E. Dunstan on the Coefficient of 



coefficients would not be observable by this method. Un- 

 doubtedly in this limiting case we should be dealing with a 



Fiff. 2. 



vf;o 













\ \ ^ 













^A CO 











2 



3 





\ -^ 









s 







\ 













^^\. 



X^<5- 



" 



-- 









V 



40 

 l//i lues or A 



10- '* 



100 



pseudo liquid ; in fact, from the point of view indicated by 

 this work, lead, and particularly tin, are quite comparable 

 with such viscous liquids as the pitch-tar mixtures with which 

 Trouton experimented. 



In fig. 2 some attempt has been made in a preliminary 

 way to investigate the character of the effect of load on the 

 coefficient of viscous traction. The effect is most pronounced 

 with large percentages of lead, so much so that the question 



