Elara sat back, the pencil behind her ear. Through the round window, the sun had shifted, casting long rectangles of light across the dusty floor. The chart rustled slightly in a breath of cooler air.
): The volume occupied by one kilogram of dry air, indicated by steep diagonal lines. How to Use a Psychrometric Chart psychrometric chart
): The weight of water vapor per unit weight of dry air, shown as horizontal lines. Relative Humidity ( Elara sat back, the pencil behind her ear
To Elara, it was a map of the invisible. Elara sat back
Her grandfather’s voice echoed in her memory: “The chart doesn’t lie, Ellie. It just shows you what the air is too shy to say.”