388 Mr. E. Wilson on the Law of Dispersion. 



Soft Crown Glass. Density 2*55035. 



Eay. 



Observed. 



ft. 



Calculated. 



Difference. 



* 



1-531415 

 1-526592 

 1-520994 

 1-518017 

 1-514580 

 1-511910 

 1-510918 

 1-508956 



1-531415 



1-526624 

 1-520995 

 1-517988 

 1-514589 

 1-511913 

 1-510932 

 1-508955 



•000000 

 •000032 

 •000001 

 •000029 

 •000009 

 •000003 

 •000014 

 •000001 



F 



E 



^ 



B 



A 





Extra Light Flint Glass. Density 2*86636. 



Eay. 



Observed. 



p. 



Calculated. 



Difference. 



& 



1-562760 

 1-556375 

 1-549125 

 1-545295 

 1-541022 

 1-537682 

 1-536450 

 1-534067 



1-562760 

 1-556438 

 1-549125 

 1-545280 

 1-540998 

 1-537682 

 1-536477 

 1-534067 



•000000 

 •000063 

 •000000 

 •000015 

 •000024 

 •000000 

 •000027 

 •000000 



F 



E 



fr 



B 



A 





Light Flint Glass. 



Density 



3-20609. 



Eay. 



fi. 



Observed. 



p. 



Calculated. 



Difference. 



% 



1-600717 

 1-592825 

 1-583881 

 1-579227 

 1-574013 

 1-570007 

 1-568558 



1-600717 

 1-592874 

 1-583881 

 1-579195 

 1-574014 

 1-570013 

 1-568558 



•oooooo 



•000049 



•oooooo 



•000032 

 •000001 

 •000006 



•oooooo 



F 



E 



£ 



B 





Dense Flint Glass. Density 3*65865. 



Eay. 



fi. 



Observed. 



Calculated. 



Difference. 



S* 



1656229 

 1-646071 

 1-634748 

 1-628882 

 1-622411 

 1-617477 

 1-615704 



1-656229 

 1-646168 

 1-634748 

 1-628858 

 1-622411 

 1-617473 

 1-615700 



•oooooo 



•000097 



•oooooo 



•000024 



•oooooo 



•000004 

 •000004 



F 



E 



fr 



B 





