PROCEEDINGS OF TIIK ANATOMICAL AND ANTHROPOLOGICAL 



From both of the last tables it is apparent that the greater the 

 amount of pigment present in hair and in skin, the darker are the 

 irides. 



COLOUR VISION. 



The number of colour-blind amounted to twelve, i.e., 3 per cent. 

 This is about the percentage obtained by other observers. None of 

 the females had colour-blindness. The test was made by means of 

 Holmgrens wools, a test which the Colour Vision Committee of the 

 British Medical Association report ' was sufficient for the detection 

 of a large number of cases of colour-blindness, but that some cases 

 could not be detected. 



Some of the more important results shown by the statistics 

 are : 



The eyes with vision below normal before correction of their re- 

 fractive errors amounted to 31 '5 per cent, of the total eyes ; 76 per 

 cent, of those eyes with vision below normal, before any errors of 

 refraction had been corrected, were able to obtain normal vision after 

 their refractive errors had been corrected by suitable lenses. 



The proportion of the students with vision below normal in both 

 eyes before correction by lenses of their refractive errors amounted to 

 24 "25 per cent. 



87 per cent, of those students with vision below normal in both 

 eyes, before correction by lenses of their errors of refraction, had 



1 British Medical Journal, Feb., 1904. 



