258 MR HARVEY on an Anomalous Case of Vision 



marigold, and the iron-flint, although presenting so marked a 

 difference to the perfectly formed eye, appeared to display no 

 variety to him. To the latter, indeed, he gave the name of olive. 

 The colours of the common garden rose and peach blossom, 

 were both designated lead-colour. To him, therefore, some of 

 the sweetest and most delicate colours of creation presented but 

 little beauty. 



In the case of Browns, there was much uncertainty ; in the 

 greater variety of cases assimilating them to green. Mineral pitch, 

 although clearly a variety of brown, he considered to be black ; 

 and liver-brown he designated in the same manner. Chesnut- 

 brown he could not distinguish. An article of dress, indeed, of 

 the latter colour, he repaired with silk of an olive-green ; and, on 

 another occasion, he considered covered buttons of a bottle-green, 

 as a perfect match for a dress of a blackish-brown. Two frag- 

 ments of cloth, one a duck-green, and the other a liver-brown, 

 were placed before him, and he was unable to point out the dif- 

 ference. 



From his having regarded crimson-red both as dark-blue and 

 black, it was anticipated that he would confound the two latter. 

 This accordingly took place, when the indigo and Prussian blues 

 of SYME'S Nomenclature of Colours were shown him, calling 

 them both black, notwithstanding they exhibited a marked dis- 

 tinction in that excellent work. 



From the preceding observations it appears, that the only 

 colours he was capable of distinguishing with certainty (by day), 

 were White, Yellow, and Grey ; and that in the proper percep- 

 tion of the following colours, there appeared to be varied degrees 

 of uncertainty. 



