118 Lieut. Baddeley on the geognosy 
nite. The course of this lake is generally to the north of west. 
Its shores are low, interspersed with elm and ash and fit for cul- 
tivation, particularly the northern side. On Lake Kenwango- 
mi the prevailing timber was white birch, and neither ash nor 
elm was seen. Although the immediate shore of Lake Ken- 
wangomishish on its southern side is low, on retiring back from 
it the lands become ultimately as elevated as those on the north- 
ern shore of Lake Kenwangomi, of which they are probably 
# continuation. 
The river of Alders, the outlet from Lake Kenwangomt- 
shish, flows through an alluvium composed of layers and mix - 
tures of sand andclay. ‘The course of this riveris exceeding- 
ly tortuous, a circumstance often characteristic of these alluvial 
deposites, and being narrow it is much obstructed by fallen trees, © 
and the entanglement and intertwining of the branches of al- 
der, with which both banks are covered, rendering portages 
sometimes necessary where there is plenty of water and little 
current. The portage des Aulnets, however, is occasioned by 
the river tumbling ever the rocks, which re-appear in this place. 
They are composed of flesh-coloured felspar, green hornblende, 
and a few seales of black mica, forming a beautiful syerite: 
‘Phe felspar on the surface of the rock was, as is usual, ob- 
served to be in an incipient state of decomposition. The soil 
examined in crossing the portages in descending the river of 
AHers was tolerably good. It consists, beneath the usual lay- 
er of vegetable matter which characterizes these woodlands, of 
clay and sand mixed, or in alternate layers, the latter frequent - 
ly in excess on the surfuce. In some places the land is hilly, 
but few rocksare seen. At the north-western extremity of the 
Portage of Alders, a natural section affording the opportu- 
nity, a more particular examination of the soil was made and 
registered as follows :—Ist. Decayed and decaying vegetation ; 
Qad. A layer of sand one foot six itches in thickness; 3rde 
Clay 
