256 MR HARVEY on an Anomalous Case of Vision 



specimens of cloth, of different shades of that colour. This, I 

 found from his master, was the occasion of much uneasiness to 

 him ; and he at last was compelled to ask one of his fellow- work- 

 men to point out the green bundle to him, although they had 

 been charged not to assist him in his difficulty. His master hav- 

 ing discovered this circumstance, substituted some pieces of black 

 and brown for some of the greens ; and he, unaware of the 

 change, furnished the following as varieties of green. 



Four specimens of dark bottle-green. 



One reddish-black, (21)") 



One raven-black, (22) ( 



One liver-brown, (104) C 



One blackish-brown, (108)3 



When SYME'S specimen of verdigris-green was placed before 

 him, he declined giving any name to it, but remarked that it was 

 certainly not green. The beautiful green of the emerald (52.), 

 he called pale orange ; and to grass-green he applied the same 

 remark as to verdigris. Duck-green, which forms so interesting a 

 feature in the neck of the mallard, he named brown or green, 

 displaying much uncertainty ; and the same ambiguity was ma- 

 nifested, when olive-green was shown him. On another occasion, 

 being requested to point out two colours in the page, that re- 

 sembled each other, he immediately fixed on the two last-men- 

 tioned, and again called them brown. 



All his ideas of green appeared to be extremely confused. 

 On being told that SYME'S specimens were varieties of that co- 

 lour, and requested to point out one that bore a resemblance to 

 the green fields, he expressed his surprise at the remark, and 

 contended that they bore no resemblance to it. The darker 

 kinds of green he considered to be brown ; those of a middle 

 tone ambiguous ; and the lighter kinds, as in the case of emerald- 

 green, of a pale orange colour. 



