Travels in the Mogul Empire (Bernier) 21.5

21.5

I had almost forgotten to notice another fact which fell under my observation while living in Dehli. There never falls any heavy rain until a great quantity of clouds have passed, during several days, to the westward; as if it were necessary that the expanse of atmosphere to the west of Dehli should be first filled with clouds, and that those clouds finding some impediment, such as air less hot and less rarefied, and therefore more condensed and more capable of resistance; or encountering other clouds and contrary winds, they become so thick, overcharged and heavy, as to burst and descend in rain; in the same manner as it happens when clouds are driven by the wind against some lofty mountain.