_f_ Light Plumbago Gray Light Heliotrope-Gray Light Vinaceous-Gray _d_ Plumbago Gray Heliotrope-Gray Vinaceous-Gray _b_ Deep Plumbago Gray Deep Heliotrope Gray Deep Vinaceous-Gray Dark Plumbago Gray Dark Heliotrope Gray Dark Vinaceous-Gray _i_ Plumbago Slate Heliotrope-Slate Vinaceous-Slate _k_ Dark Plumbago Slate Dark Heliotrope Slate Deep Slaty Brown _m_ Dull Violet-Black (3) Dull Purplish Black Aniline Black _Plate LI_ 1′′′′′ RED 15′′′′′ Y-O. 23′′′′′ YELLOW _f_ Pallid Quaker Drab Pallid Mouse Gray Pale Olive-Gray _d_ Pale Quaker Drab Pale Mouse Gray Light Olive-Gray _b_ Light Quaker Drab Light Mouse Gray *Olive-Gray Quaker Drab *Mouse Gray Deep Olive-Gray _i_ Deep Quaker Drab Deep Mouse Gray Dark Olive-Gray _k_ Dark Quaker Drab Dark Mouse Gray Iron Gray _m_ Sooty Black Blackish Mouse Gray Olivaceous Black (3) _Plate LII_ 35′′′′′ GREEN 49′′′′′ BLUE 59′′′′′ VIOLET _f_ *Pearl Gray *French Gray *Lilac-Gray _d_ Dawn Gray *Cinereous Pale Violet-Gray _b_ Hathi Gray *Plumbeous Light Violet-Gray Storm Gray Deep Plumbeous Violet-Gray _i_ Castor Gray Dark Plumbeous Deep Violet-Gray _k_ Dusky Green-Gray Blackish Plumbeous Dark Violet-Gray _m_ Blackish Green-Gray Plumbeous-Black Blackish Violet-Gray _Plate LIII_ 67′′′′′ V-R. NEUTRAL GRAY CARBON GRAY White White *10. Gray. (Pale Gull Gray) _f_ Pallid Purplish Gray Pallid Neutral Gray *9. Gray. (Light Gull Gray) _d_ Pale Purplish Gray Pale Neutral Gray *8. Gray. (Gull Gray) _b_ Light Purplish Gray Light Neutral Gray *7. Gray. (Deep Gull Gray) Purplish Gray Neutral Gray *6. Gray. (Dark Gull Gray) _i_ Deep Purplish Gray Deep Neutral Gray *5. Slate-Gray _k_ Dark Purplish Gray Dark Neutral Gray *4. Slate Color _m_ Dusky Purplish Gray Dusky Neutral Gray *3. Blackish Slate Black *1. Black *2. Slate-Black EXPLANATION OF PLATES XXII AND XXIV. Reference to these plates was unfortunately overlooked when the text was going through the press. These plates are simply _extras_. They were made at an early stage in the preparation of the work and discarded; but were finally inserted, merely to add to the number of colors represented. Transcriber's Note