Producing a successful invention requires many daring experiments. In 1786, popular scientist Rey de Planazu was invited to various estates in France to advise the landowners on new technological ideas designed to improve agricultural production. The results of these journeys were published in the volume Oeuvres d’agriculture de M. de Planazu, which provides details and illustrations of innovative farming inventions. Each part is dedicated to various members of the French nobility, including Louis XVI, with each plate bearing the relevant coat of arms.Rey Deplanazu. Oeuvres d’agriculture de M. de Planazu. (Paris: Grangé, 1786-1787).