1$ 



Attempt to naturalise 



glass, we perceive a perfect representation of our figure, occu- 

 pying that black spot behind the cornea, of very small dimen- 

 sions. The fourth coat is the i^etina (from rete, a net), which 

 is a very delicate network spread within the choroid, as far 

 as where that membrane or tunic meets the cornea. The 

 retina is an expansion of the optic nerve, which enters the eye- 

 ball at the posterior part, through a hole made for its passage, 

 rather nearer the nose than the centre of the orb. The optic 

 nerve arises from the brain ; but in some experiments conducted 

 by Dr. Wilson Philip, I believe, the thalami nervorum opti- 

 corum, whence this second pair of nerves (as the optic nerves 

 are called) originates, were destroyed in some animals, and the 

 eyes did not seem to have lost their powers ! 



I am, Sir, yours, &c. 

 May, 1830. B. S. 



(To be continued.) 



Art. V. Notice of an Attempt to naturalise the Virginian Partridge 

 in England, By J. C, Staffordshire. 



Sir, 

 I TAKE the liberty of sending you a few observations upon 

 the habits and manners of a recently imported bird from 

 America, which M. Audubon denominates the Virginian 

 partridge, accompanied by a drawing (^^.8., male and female) 

 taken from the birds in my possession. 



A few years ago I purchased two brace of these elegant 

 little birds from Mr. Cross of Exeter Change, London, and 



