It was soon noted that air pressure rises and falls as the weather changes, a drop in pressure often signaling a storm. The hygrometer, which measures atmospheric humidity, was developed in 1664.
वातावरणातील आर्द्रतेचे मापन करणारे यंत्र अर्थात आर्द्रतामापक १६६४ साली तयार करण्यात आले.