A Shower in falling, darkens the Air, and gives it a precarious Tincture; being found to receive the Light of the Sun on the one side, and being shadow'd on the side opposite thereto, as is observed in Clouds; the Earth becomes overspread with a Dusk, or Gloom, its Light being intercepted by the descending Shower: Objects seen through it, will appear obscure, and indistinguishible, those near at hand, being, however, the most evident and distinct; and it must be observed, that such as are found on the shadow'd side of the Shower, will be more conspicuous than those on the side illumined; the reason of which is, that the former lose nothing but their Principal Lights, whereas the latter, lose not only their Lights, but their Shadows too; their illumined parts being confused with the brightness of the Air, and the shadow'd parts, likewise, illumined and weaken'd, by means of the said enlighten'd Air.