272 



ME. J. C. MAXWELL GARNETT 



The values of n/c/\, calculated from Table IV. of the former paper,* using however 

 new and more accurate values in the case of silver with red light, and from 

 Table VII. above, are shown in Table VIII. The corresponding values of M 

 are given in Table IX., in which table the values of the reflecting power R have 

 also been included. 



In order to facilitate the consideration of the colours which should, according to 

 the above analysis and calculations, be exhibited by gold and silver films when their 

 specific gravities vary but their microstructures remain amorphous or granular (small 

 spheres), graphs of n/c/\, of M , and of R are given in the accompanying figures 

 (figs. 8, 9, 10, 11, 12, and 13). In these figures the abscissse represent the volume 

 proportion, /A, of metal, and the ordinates the value of the function. The curves 

 have been fitted to the plots of the numerical values shown in Tables VIII. and IX. 

 In each case the positions of the plots of calculated values have been indicated by 

 small circles. 



TABLE VIII. Value of n K /K. 



'Phil. Trans..' A, 1904, p. 406. 



