356 Canadian Record of Science. 
lowed, rises as a rounded knob, twenty feet above its general 
level. This hill, like the others, appears to be composed of 
gypsum, as on its sides are holes extending down twenty 
feet below its top in which beds of gypsum are well exposed, 
In the north-west corner of township 32, range 8, west of 
the Principal Meridian, is a rounded hill rising thirty-five 
feet above the plain, its greatest length being about 600 feet, 
and its greatest breadth 150 feet. Its surface is overgrown 
with small canoe-birch Two holes, each about eight feet 
deep, have been dug by prospectors in this hill. One at the 
top shows, below a foot of decomposed material, seven feet 
of hard, compact, white anhydrite or “bull plaster,” exhibit- 
ing a more or less nodular structure, and breaking on the 
surface into small irregular fragments. Very little bedding 
can be detected in the mass. The other hole is in the side 
of the hill fifteen feet lower down, and shows on top two 
and a half feet of white clay, consisting of decomposed 
anhydrite, below which is five and a half feet of white 
nodular anhydrite similar to that in the other hole. This 
gives a thickness, almost certainly, of twenty-two feet of 
this rock, and it is not improbable that the hill is composed 
entirely of it. 
Again, just north of the Ninth Base Line, and two miles 
east of the township corner, between ranges 8 and 9, is a 
poplar-covered hill or ridge, thirty feet high. In various 
places on this hill are exposures of snow-white gypsum, 
similar to what has been described above, showing in some 
cases a thickness of ten feet in one section. The most of it 
is massive or crypto-crystalline, and lies in regular beds 
which dip slightly towards the west. Some of the beds or 
layers, however, consist of beautifully crystalline, clear, 
colourless selenite, which is easily broken out in lamellar 
masses of considerable size. This is the mineral which in 
the west, has been so often mistaken for mica. 
The above is a brief statement of the known extent of 
the deposits of gypsum in this district, but it is highly 
probable that further investigation will prove them to 
extend over a much larger area. The Indians of the 
