“Such artistic forays into the countryside had been made easier by the invention, in 1824, of metal tubes for oil paints, which replaced the messy and awkward pig bladders in which artists of previous generations had kept their paints; and by the introduction of collapsible three-legged stools and portable easels, both of which could be carried into the countryside by the artist.18.”

“Such artistic forays into the countryside had been made easier by the invention, in 1824, of metal tubes for oil paints, which replaced the messy and awkward pig bladders in which artists of previous generations had kept their paints; and by the introduction of collapsible three-legged stools and portable easels, both of which could be carried into the countryside by the artist.18.”

— Ross King