OF THE EXTERNAL SENSES. 3ol

blind from the Ihell, and to continue fo for atleaft fome days thereafter. Till they are able tofly they are fed by the joint labor of both parents.As foon as that period arrives, however, and pro-bably for fome time before, they evidently en-joy all the powers of Vifion in the moft completeperfection, and can diflinguilh with moft exad pre-cifion the fliape and proportion of the tangibleobjeCts which every viftble one reprefents. Info ftiort a period they cannot be fuppoled to haveacquired those powers from experience, andmull therefore derive them from fome inftin Clivesuggestion. The fight of birds feems to be bothmore prompt and more acute than that of anyother animals. Without hurting themselves theydart into the thickeft and moft thorny bullies, flywith the utmoft rapidity through the moft intri-cate forefts, and while they are soaring aloft inthe air, discover upon the ground the little in-feds and grains upon which they feed.

The young of several forts of quadrupeds feem,like those of the greater part of birds which maketheir nefts upon the ground, to enjoy as foon asthey Come into the world the-faculty of feeingas completely as they ever do afterwards. Theday, or the day after they are dropt, the calffollows the cow, and the foal the mare, to thefield ; and though from timidity they seldom re-move far from the mother, yet they feem towalk about at their eafej which they could notdo unless they could diflinguilh, with fome de-gree of precision, the fliape and proportion of