Werner, in his suites ofcolours, has left out the terms Purple andOrange, and given them under those ofBlue and Yellow

omenclature of his own inhis description of minerals

Werner's suitesof colours extend to seventy-nine tints

To re-move the present confusion in the namesof colours, and establish a standard thatmay be useful in general science, parti-cularly those branches, viz. Zoology, Bo-tany, Mineralogy, Chemistry, and Mor-bid Anatomy,