ORANGE-Dew, a kind of dew which falls in the spring time from the leaves of orange and lemon trees, which is extremely fine and subtil. M. de la Hire observing this, placed some flat pieces of glass under the leaves to receive it: and having procured some large drops of it, was desirous of discovering what it was. He soon found that it was not merely an aqueous fluid, because it did not evaporate in the air; and that it was not a resin, because it readily and perfectly mixed with water: it was natural then to suppose it a liquid gum; but neither did this, on examination, prove to be the case; for being laid on paper, it did not dry as the other liquid gums do. Its answering to none of these characters, and its being of the consistence of honey, and of a sweet sugar-like taste, gave a suspicion of its being a kind of manna; and whatever in the other trials had proved it not a resin, a gum, &c. all equally tends to prove that it is this substance.