20 
with colours, to know the different varieties mention- 
ed in the descriptions of mineralogists. Wiedemann, 
Estner, Ludwig, and several others, have published 
tables of this kind; but all of them were deficient, 
not only in accuracy, but also in durability. Having 
the good fortune to possess a Colour-Suite of Mine- 
rals, made under the eye of Werner, by my late friend 
H. Meuder of Freyberg, and being desirous of making 
this collection as generally useful as possible, I men- 
tioned my wish to Mr Syme, painter to the Werne- 
rian and Horticultural Societies, who readily under- 
took to make a delineation of all the varieties in the 
collection. This he executed with his usual skill and 
accuracy 3 adding, at the same time, to the series se- 
veral other colours, which he has distinguished by 
appropriate names, and arranged along with those in 
the Wernerian System. The whole have been pub- 
lished in a series of tables, in a treatise which ought 
to be in the hands of every mineralogist, and indeed 
in the possession of naturalists of every description. 
© The older and some of the modern mineralogists, 
in their descriptions of the species of minerals, use 
only single varieties of colour. It was Werner who 
first made the remark, that single varieties are not. 

