2 6 On the late Mr. Hunter's preparation 
appearance in that humour, appertains to Leuwenhoek; but 
the discovery of an eye in which this structure of the crystalline 
humour was perfectly distinct, and in which all the circum- 
stances, of course, and situation, could be determined, is due 
to Mr. Hunter : and if it should be found by future observa- 
tion and experiments, that this structure, which is different 
from any that has hitherto been described, is capable of pro- 
ducing consequent actions and effects, sufficient to explain the 
adjustment of the eye to different distances, it will not be con- 
sidered as a small, or unimportant discovery. 
The melancholy event which has deprived this learned So- 
ciety of so valuable a member* and which has taken from me 
so able an instructor, so rare an example, and so inestimable a 
friend, is too recent, to make any apology necessary for the 
shortness, or incorrectness of this account. I thought it due to 
the memory of my friend, that no promise of his, however ina- 
dequate I feel myself to the performance, should be left unful- 
filled ; and the circumstances of distress, under which it has 
been drawn up, will procure for me every indulgence from 
this learned Society. 
Leicester Square, EVERARD HOME. 
Nov. 4> 1793- 
EXPLANATION OF THE PLATE, Tab. V. 
Fig. ist. A transverse section of the crystalline humour of 
the eye of a cuttle-fish, to shew its structure ; the central 
part is transparent, but the others are opaque, having been 
coagulated by proof spirits ; and give the appearance of distinct 
fibres surrounding the central part. 
