382 Dr. C. R, Alder Wright, [Jan. 28, 



with the entire Series VI where excess of lead was used, on account 

 of showing less general concordance with the average than the others, 

 obviously on account of incomplete intermixture and consequent 

 formation of alloys not so truly conjugate as in the other cases. In 

 all 88 compound ingots, and consequently 176 ternary alloys, were 

 used in the deduction of the 14 pairs of conjugate points thus 

 tabulated, so that each point represents the average of somewhat 

 more than six alloy analyses. 



Fig. 4 represents these values plotted on the triangular system. 



On comparing the figures in the last column with the corresponding 

 ones obtained in the previous experiments (Part I), it is noticeable 

 that the tin distribution is such that the excess of tin percentage in 

 the lighter alloy over that in the heavier one now shows two maxima, 

 the second of which was not indicated by the former less complete 

 series. The first is a + maximum, arrived at near the 5th tie-line ; 

 the second a maximum, situated near to the 13th. Obviously the 

 existence of a maximum (+ or ) is a necessary result of a slope 



