in Canada~ By W. Green, Esq, AS 
the mountains which is of less weight than most other earths. 
fu its dry state, it is of a rich cinnamon colour. Fn oil it is 
transparent, and of a tint intermediate between those of raw 
and of burat umber. Made red hot and extinguished in water, 
a sulphurcogs edour is given out, and the burnt matter well 
washed and dried, inclines rather more towards red than be- 
fore, but loses its transparency. In this state, it would pro- 
bably have no peculiar utility. The transparent tint it affords 
- with oil in its raw state might be very useful, unless the sul- 
phar it appears to contain should impair its properties. This, 
however, may not be the case ; as vermillion, which is a sul- 
phuret (of mercury) is durable, whether combined with other 
colours in oil or net. As a colour for glazing, this circum- 
stance might form a slighter objection than it might do, were 
the substance used in combination with white or other co- 
fours—indeed it appears best adapted for glazing, as there is 
no peculiar beauty in the tints it forms with opaque colours. 
Many of the spontaneous vegetable productions of this coun- 
try are capable of affording brilliant and durable colours to 
the painter aud the dyer. ‘The Indians extract from the root 
of a wild plant which bears some resemblance to madider, a 
very bright and permanent red dye, with which they tinge 
their porcupine quills, elk hair and other substances. A red 
luke has been extracted from it by boiling it in a saturated 
solution of alum in water, (after having separated a quantity 
of brown colouring matter by washing the root in cold water, 
in which the brown, but not the red, matter is soluble; and 
precipitating the red substance from the alaminous solution 
by means of an alkali. ‘I'he volatile alkaliis the best. The 
hue of this lake, when used in oil, is equal in beauty, 
but not in intensity, to that of the finest carmine, and resists 
the action of light much longer. Patches of various speci- 
mens of carmine and red Jake from cochineal were painted 
in oil on a window pane, which all faded, more or less, and 
some nearly disappeared on being exposed to strong light for 
two weeks ;—whereas patches of red luke from the Indian 
plant 
