8 
Mr. Home's Lecture 
ture was now reduced to of an inch, and objects appeared 
much more. distinct at 5-§- inches ; when the glass was brought 
within half an inch of the eye, objects were still more distinct, 
and were seen at 5 inches. 
The eye was less affected by these than the former experi- 
ments, nor was it fatigued by the light of the candle. In strong 
lights a faint image was seen by the imperfect eye, and always 
to the left of the other. 
The perfect eye, with a glass of 15 inches focus, saw objects 
most distinctly at 8^- inches, the extremes 3^ inches and 11^ 
inches. 
As these experiments were made with a view to determine 
whether the eye, when deprived of its crystalline humour, had 
a power of adjusting itself to different distances ; that being 
ascertained, they were not prosecuted further, on account of 
the tender state of the man's eye, who went into the country 
as soon as they were completed. 
On the 4th of November, 1794, the man returned to Lon- 
don, and submitted himself to be the subject of further experi- 
ments. This afforded us an opportunity of ascertaining the 
comparative adjustment of the two eyes, when by means of 
different glasses they were brought to see distinctly at nearly 
the same focal distance : an experiment we had been unable 
to make before for want of proper glasses. 
Sir Henry Englefield, who will be found to have given 
us his assistance in the subsequent part of this investigation, 
was present at this experiment, and was much astonished, as 
we had been in the former ones, at the accuracy with which 
the man's eye was adjusted to the same distance in the re- 
peated trials that were made with it. 
