106 Proceedings of Boyal Society of Edinhurgh. [sess. 
ing). The patient was found to have a neutral point like them, and 
the intensity curves of his two colours were defined. The blue 
colour did not materially differ from that of others, but the yellow 
colour formed an intermediate between that of the “ red-blind ” and 
that of the “green-blind,” both as to the position of its maximum 
and its general form. 
The same author in speaking of cases of atrophy of the optic nerve 
(Grsefe, vol. xxvi.) says, “Wherever red fails, green fails also.” 
B. 
Becked s Case of One-Eyed Colour-Blindness, 1879. 
This was a curious case. A little girl only three years old had 
remarked to her mother that objects in the room looked a different 
colour according as she lay in bed on her right or her left side. 
This led to an examination, when it was found that the same 
objects appeared of different colours to her right or her left eye. 
The abnormal eye proved to be almost totally blind to colour. 
This was the first case clearly made out where the two eyes had 
different colour vision. 
P. 
Notes hy Von Hippel on Ms Case of One-Eyed Dichromic Vision, 
1880-81. 
There was no shortening of the spectrum at either end. When 
shown the full extent of the spectrum, the patient described 
the extreme left-hand end rightly as red ; the yellow and green he 
called “ yellowish and greenish,” all the remainder blue. But 
when the colours were divided into small strips, so that he could 
not see what part of the spectrum they belonged to, then from the 
extremest red, through yellow to the green-blue he described 
all as yellow, and from thence to the violet end all as blue. The 
single nuances of red, yellow, and green appeared, indeed, differing 
in brightness, but all of the same quality of colour, and the 
same with blue and violet. The brightest spot in the spectrum for 
the right (dichromic) eye was to the right of the sodium line, 
about in the middle between it and the green calcium line ; but for 
the left eye (normal) it was left of the sodium line. With 
