Note 13 — The First Self-Registering Instruments
Reading edition
But a Dutch patent was awarded to one William Douglas in 1627 for the determination of wind pressure (G. Doorman, Patents for Inventions in the Netherlands during the 16th, 17th and 18th Centuries, The Hague, 1942, p. 127), and Leonardo da Vinci left a sketch of both a wind pressure meter and a hygrometer (Codex Atlanticus, 249 va and 8 vb).