168 PROFESSOR WARTMANN ON DALTONISM, 
was that of a weaver, but he gave it up, because he confounded 
the red, black, green and purple threads. In the rainbow he only 
discerns the yellow and blue; nevertheless he indicates its form 
correctly, and was one day the first to point out a comparatively 
feeble secondary arc. He much more commonly recognises per- 
sons by their voice than by their features. Not one of his numerous 
children, nor of his relatives in the ascending line, is a daltonian. 
The principal characters of his vision are the following :— 
In open day he confounds all the tints of white; he names 
correctly the yellow and its varieties; calls orange an intense 
yellow, but does not see in it any mixture of red; he hesitates 
as to the pale tints, which he designates as yellows, reds, browns, 
or even drabs, and cannot assign any name to the very dark 
shades; he confounds red with lilac, rose, brown, black, white, 
although he perceives the difference of the light tints and dark 
tints ; he has but very confused notions of green, which he thinks 
to be white, lilac, yellow, blue, or black; he is scarcely at all 
deceived in the blue, but extends the denomination to violet; 
lastly, he cannot ever characterize either brown, or gray, which 
he calls lilac, or even the darkest black. In bright candlelight 
he sees white, gray, yellow and green as by day; he recognises 
orange well enough, but calls the dark reds and dark blues black ; 
the light blues, blues and rose-colours ; he cannot specify the 
shades of violet and brown, nor those of black, which he takes 
for brown, red, green or black. 
Lastly, we are indebted to Prof. Seebeck for the account* of 
twenty-one cases of daltonism, fifteen of which have been studied 
with great sagacity. I shall not enter into the detail of his ob- 
servations ; the conclusions which he draws from them, and which 
have been related above, render this the less necessary, as there 
is scarcely any peculiarity of which the cases previously de- 
scribed do not offer examples. I shall confine myself to the re- 
lation of the most striking traits of the vision of a daltonian of 
his first class +. 
He is a young man eighteen years of age, who calls greenish- 
blue and lilac, blue; bluish-green, pure gray, lilac-gray, rose-co- 
lour, violet-rose and light blue passing into gray or greenish, 
green ; the yellow, orange, reddish-yellow, light yellowish-green, 
yellowish-brown, and rust-brown, all red; the dark yellowish- 
red and dark grass-green, brown; the crimson, dark violet, dark 
blackish- or bluish-green and the brown, red or brown: green 
* Mem. cited. + Mem. cited, p. 180. 
