

[ 385 ] 



XII 



Films. 



INDEX SLIP. 

 Commi'nicat.ed i 



ambridge. 



UAKNETT, J. ('. M. Colours in Metal Glasses and in Metallic Films. 



Phil. Trans., A, vol. 208, 1904, pp. 885-420. 



" Allotroptc" Silver Constitution, Origin of Colour of. 



GARNBTT, ,T. C. M. Phil. Trans., A, TO!. 203, 1904. pp. 385-420. 



fnt roiiucttoit. 



Coloration of Glass by Reduced Metals ; Action of Radium. 



GABHETT, J. C. M. Phil. Trans., A, rol. 203, 1904, pp. 385-420. 



r> -.,. (V)f )f**\| IkU 



Coloured Metallic Films Cause of Change on Annealing. 



&ABXBTT, J. G. M. Phil. Trans., A, TO!. 208, 1904, pp. 3K5-420. 



Nascent Crystals of Metal, Spherical Form. 



GA'BITBTT, J. C. M. Phil. Trans., A, vol. 203, 1904, pp. 385-420. 



proportion may have any vulur. from , 



In Part I. ti>.' ^hsr-i". .--.fii.i-: of SIKI-KN. 



operties of a medium 

 ) two Parts : the first 

 woportion of volume 

 al films, iu which tliis 



' beyond the limit of 

 >ed. It is shown that 

 d which, when their 

 endeavoured to show 

 -length of light in the 

 I ruby glass, and that 

 IBS exhibited by gold 

 irticles or to excessive 

 ler. It is also shown 

 glass the ruby colour 



microscopic vision ( Ann. dri Pin 

 the particles soe.ti in ;i gold rutiv <:''*>.-: 

 uetera are kvvi t!i:m O'l^i. ai-. 1 arciirat'N 

 that the presence of many of tlx^o u>.ii 

 a* \rill account, for ali the optical v 



Clarities in colour and in [!. 

 -*s are due to excessive distance betw>- t ii < 

 of such ]Mi'*:i i !<?5;, the latter, howescr, involving list 

 i'n irom radium is capable of producing in g- 



dopted enables us to 

 form in a glass what 

 colon; ss will be in its " regular" mtnte. 



ur on heating, of the 



Proc.,' vol. 72, p. 226), 



Professor R. W. WOOD 



ng that they can be 



,-jsed of minute metal spheres of 



. 



17.8.04 



