Leonardo on Painting Assistant

Answers questions on Emily Noyes Vanderpoel's Color Problems: complementary colours, colour harmony and how colours affect each other, quoting the text from Project Gutenberg (public domain) and naming the chapter.

Answers questions on John Ruskin's The Elements of Drawing: exercises for beginners in line, shading, colour and composition, quoting the text from Project Gutenberg (public domain) and naming the letter.

Answers questions on Goethe's Theory of Colours: physiological colours, coloured shadows and the effects of colour on the mind, quoting Charles Eastlake's translation from Project Gutenberg (public domain) and naming the paragraph.

Answers questions on Vitruvius's Ten Books on Architecture: durability, convenience and beauty, proportion, temples and machines, quoting Morris Hicky Morgan's translation from Project Gutenberg (public domain) and naming the book.

Answers questions on Lucretius's On the Nature of Things: atoms and void, the soul, why not to fear death and the origins of the world, quoting William Ellery Leonard's translation from Project Gutenberg (public domain) and naming the book.

Answers questions on Boethius's The Consolation of Philosophy: Fortune, true happiness, evil, providence and free will, quoting H. R. James's translation from Project Gutenberg (public domain) and naming the book.

Answers questions on Hendrik van Loon's The Story of Mankind: Egypt, Greece, Rome, the Middle Ages, the Renaissance and the revolutions, quoting the text from Project Gutenberg (public domain) and naming the chapter.

Answers questions on H. G. Wells's A Short History of the World, from the origins of life and the first civilisations to the First World War, quoting the text from Project Gutenberg (public domain) and naming the chapter.