{"collection":"aor","html_url":"https://unchartedknowledge.5gfusion.net/browse/aor/dv/0999.htm","path":"aor/dv/0999.htm","source_url":"https://sacred-texts.com/aor/dv/0999.htm","text":"The Da Vinci Notebooks\nTo know better the direction of the winds. 531\n220:531 : In connection with this text I may here mention a hygrometer, drawn and probably invented by Leonardo. A facsimile of this is given in Vol. I, p. 297 with the note: 'Modi di pesare l'arie eddi sapere quando s'a arrompere il tepo' (Mode of weighing the air and of knowing when the weather will change); by the sponge \"Spugnea\" is written.","title":"Vol. II: XVI. Physical Geography: 999.","type":"page"}