41 ^ 
Scientific Intelligence. — Xoology. 
cording to the alternation of good and bad weather. At lengtfs 
a month of dry weather produced so sensible an eifect, that six 
months after the animal had not experienced any new acces-- 
sion. 
16. Salmon lyf different rivers can he distinguished from each 
other. ‘ — With respect to the opinion entertained by many, that 
the salmon of one river can be distinguished from those of ano- 
ther, a strong analogical evidence is derived from the common 
trout, the Salmo Fario, which every body knows exhibits the 
greatest differences from one river to another. Even in the 
same lake, this species will exhibit, at different places, charac- 
ters so marked and so very different, that a person ignorant of 
the great variation produced by circumstances, might fancy a 
multitude of distinct species. In Loch Langavad, for exam- 
ple, in Harris, at the western extremity, among the rushes and 
scirpi, with a muddy bottom, the trouts are moderately large, 
and darkish coloured beneath, with white flesh in general. Far- 
ther on towards the east, among the small islands, where the 
bottom is rocky and pebbly, the trouts are smaller, more live- 
ly, brighter beneath, and with the spots more vivid, and the 
flesh, at least in May, June and July, is red. On the south 
side, about the middle, in deep water, the trouts are large, 
strong, with few spots, and with a tint of yellow upon the belly, 
mixed with dark grey. On the same side, near the east end of 
the loch, the trouts have more yellow beneath. On the north 
side, in a bay nearly land-locked with shallow water, they are 
very small, with white flesh. In many of the small lakes in the 
neighbourhood, and in the rivulets, they are of this last kind ; 
but in one small and deepish lake, filled with Nymphaea alba and 
carices, near the western extremity of this lake, the trouts are 
very strong, thick at the tail, with the belly deep yellow, and 
the flesh red. — Mr Macgillivray. 
PHYSIOLOGY. 
17. Case of sleep continuing for 45l days. — A sanitary re- 
port of a Prussian physician, addressed during the month of 
August, to the authorities, contains what follows. At Mede-^ 
bach in Westphalia, a young woman of twenty years has slept 
451 days. She was wakened only With difficulty, in order to 
