344 Hon. Mr* St ran gw ays on the Rapids of Imatra. 
The height to which the rock appears bare on the- west bank 
agrees perfectly with the supposed former level, and the ordinary 
nature of the banks of this river. 
N.B. The Voxa has no communication with the harbour of 
Viborg or gulph of Finland, although nine out of ten of all the 
maps that have been published of the country represent it as 
following that way. 
The separation between the primitive rocks sand sandy strata 
of this district passes nearly along a line drawn south-west and 
north-east from the Berezowsky or Birch Islands, on the Gulph of 
Finland, to the west shore of the Lagoda, a little north of Kexholm, 
passing behind the chain of lakes formed by the Voxa. 
On the shore of the Isle of Walaam, in the north part of lake 
Ladoga, a magnetic sand is found composed of octohedral grains of 
menachanite, with felspar and quartz in very unequal proportions, 
resembling the sand of the Platten Sea. It is washed up out of the 
lake by storms ; at other times none is to be found on its shores, 
nor has it yet been found in any of the rocks of the continent of 
Finland. 
Notice of the Bursting of the Lake Souvando. 
In the spring of 1818, the lake of Souvando, (PL xvii) on the west 
of the Ladoga, which is separated from it only by the little isthmus 
of Taipala, underwent a change that will probably alter its future 
geographical character. Till that time it had poured its waters 
