True amber is sometimes coloured artificially.
These coloured hybrids were originated by M.
The experiment is, in fact, much improved by passing the primary light through a coloured glass.
Although new-born fawns are spotted, the adults are in the main uniformly coloured; the general tint of the coat at all seasons being reddish tawny with a more or less marked tendency to grey.
Berzelius took 8 grams of copper, converted it into the coloured chloride, and sealed up the whole of this in solution, together with a weighed strip of copper.