176 SENSORIA.L FUNCTIONS. 



much more interesting than Chesseldens, and described 

 more in detail, was laid before the Royal Society of 

 London, in 1826, by Mr. Wardrop, a celebrated oculist. 

 This was the case of a lady born blind, but who recei- 

 ved her sight at the age of 46, by the formation of an 

 artificial pupil. 



After a third operation, which Mr. Wardrop perform- 

 ed for the artificial pupil, she returned from his house 

 in a carriage, with her eye covered only with a loose 

 piece of silk. The first thing she noticed was a hack- 

 ney coach passing by, when she exclaimed, " What is 

 that large thing that has just passed by." In the course 

 of the evening she requested her brother to show her 

 his watch, which she looked at for some time, holding it 

 close to her eye. She was asked what she saw, to 

 which she answered, " that there was a dark and a 

 bright side ;" she pointed to the hour of twelve, arid 

 smiled. Her brother asked her if she saw any thing 

 more ; she replied, yes, and pointed to the hands of 

 the watch. She then looked at the chain and seals, and 

 observed that one of the seals was bright, which was 

 the case, being a solid piece of rock crystal. 



On the third day she observed the doors on the oppo- 

 site side of the street, and asked if they were red : 

 they were of an oak color. In the evening she looked 

 at her brother's face, and said she saw his nose : he 

 asked her to touch it, which she did ; he then slipped a 

 handkerchief over his face, and asked her to look again, 

 when she playfully pulled it off. 



On the thirteenth day of the operation, she walked out 

 with her brother in the streets of London, when she 

 distinctly distinguished the street from the foot pave- 

 ment, and stepped from one to the other like a person 

 accustomed to the use of the eyes. 



" Eighteen days after the operation," says Mr. Ward- 

 rop," I attempted to ascertain, by a few experiments, her 

 precise notions of color, size, and forms, positions, mo- 

 tions, and distances of external objects. As she could 

 only see with one eye, nothing could be ascertained 

 respecting the question of double vision. She evidently 

 saw the difference of colors ; that is, she received, and 

 was sensible of different impressions from different col- 



