"with regard to Colours. 209 



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 but- 

 tons of a bottle-green, as a perfect match for a dress of a 

 blackish-brown. Two fragments of cloth, one a duck-green, 

 and the other a liver-brown, were placed before him, and he 

 was unable to point out the difference. 



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 distinction 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 gray ; and that in the proper 

 perception of the following colours, there appeared to be 

 varied degrees of uncertainty. 



Colours proposed 

 for observation. Perceptions of the proposed colours. 



Black. Generally green, in particular cases crimson. 

 Blue. Darker kinds, crimson and black. Those of a 



middle tone carmine and lake. Those of a 



lighter kind able in general to distinguish. . 

 Purple. Appeared to be blue, excepting in the case of 



a very bright purple. 

 Green. Confounded in general with black and brown. 



Greens of a darker kind appeared brown. 



Those of a middle tone uncertain as toname. 



Greens of a lighter kind dark yellow. 

 Orange. Darker kinds, brown. Lighter kinds, yellow. 

 Red. Carmine, lake, and crimson, appeared blue. 



Brown. Green. 



Since the above was written, the following eircum stances 

 occurred. He was sent to obtain some patterns of green baize, 

 and having procured five varieties, placed them on his return 

 in the shop-window. In the course of the day, his master 

 called on him to state the prices of the patterns he had ob- 

 tained, at the same time placing before him two pieces of 

 crimson cloth, and three of the green baize; and he, uncon- 

 scious of the difference, fixed prices on each. 



On being informed of the circumstance, I prepared two ex- 

 cellent specimens of the above colours, and placed them before 



Vol. 68. No. 341. Sept. 1826. 2 D him, 



