Biographical . Notice of Edward Forbes. 375 
huge panoramic canvas, ‘than on an actual receding perspect- 
ive. Our sense of the horizon is quite impaired and a strange 
Pets of look becomes. conspicuous, if we observe thus 
steadily for e time.’ In looking thus over a sheet of water, 
bordered by ada} varying from 3 to 20 miles distant, I noticed 
the same hollowing of the water near by, as before mentioned in 
the case of fog on the water... This was clearly due to the sam ‘fe 
direction. Hence objects seem to recede to one general cylinder 
around you, and the —, perception is Fre cog im- 
paired. ‘The case is thus alm of monocular vision. he 
study of these changes of sae by our aie rotation of the 
interocular base, is very interesting and instructive. It shows, not 
only the influence of this base in forming our perspective distri- 
bution of distances, but that our sense of the horizon is very 
dependent for its firmn ioe se precision on our gravity sensibility 
in our ordinary erect posi 
Various other facts finoeakiee of the general views presented 
might be instanced, but the above must now suflice. 
Arr. XXXV.—Biographical Notices of Edward Hordes and 
others ; by Witi1am Joun Hamiron, Esq.* 
Gentlemen.—It now becomes my duty, in accordance with the 
practice uniformly adopted by my 6 pba in this chair, to 
address to you some observations on the losses we have sustained 
during the past year, and it is with biceibned sorrow that I have 
first to allude to one whose name can never be mentioned in these 
rooms without emotion. I need not say that I allude to Edward 
Forbes, who was endeared to us by every tie of social friendship 
and <ecarame: merit, and who has been snatched away from us at 
the moment when he had reached the highest position his ambi- 
tion could eer coveted, or his admiring countrymen could have 
bestowed on him. Se arcely had a few short months intervened 
since he had been called by the universal voice of the science of 
overwhelmed by the unexpected announcement of hisdeath. We 
the err vei Address of the — of the ae Society of 
as, "of Feb., 1855 
