A. J. Bull

• Accuracy attainable by straightforward colour reproduction
• An outline of the principles of tri-colour printing
• Direct three-colour on dry plates
• Direct three-colour work on dry plates
• Fox Talbot's pioneer work in photo-engraving
• Note on colour mixture curves and colour sensation curves of the spectrum
• Notes on the optical properties of three-colour printing-inks
• On three-colour additive photography
• Photo-engraving
• Scenery and its causes
• Terrestrial heat and earth movements
• The colour patch apparatus and its application