Horticultural Colour Chart Volume 1 and 2
London The British Colour Council in Collaboration with the Royal Horticultural Society. 1938
Each volume with a staple-bound booklet and 100 loose colour sheets, in folding hardcover case, in slipcase. The colours consist of a spectrum range of 64 full hues, 26 (lighter) tints and 10 (darker) shades of the 64 full hues. Loosely inserted in volume one is a sheet of black card with central square cut out to allow each colour to be isolated by the viewer. The charts are known also as the Wilson Colour Charts.