300 OF THE EXTERNAL SENSE S.

tangible objefls which furround them. We may of-ten fee them, accordingly, by the ftraighteft road,run to and pick up any little grains 'which lheihows them, even at the diftance of fever a 1 yards;and they no fooner come into the light than theyfeem to underhand this language ofVifion as wellas they ever do afterwards. The young of thepartridge and of the groufe feem to have, at thefame early period, the molt diltin£t perceptionsof the fame kind. The young partridge, almoftas foon as it comes from thelliell, runs about amonglong grafs and corn ; the young groufe amonglong heath , and would both molt eifentially hurtthemfelves if they had not the molt acute as wellas diftinft perception of the tangible objects whichnot only furround them but prefs upon them onall Tides . This is the cafe too with the young ofthe goofe, of the duck, and, fo far as I havebeen able to obferve, with thofe of at lealt thegreater part of the birds which make their neltsupon the ground, with the greater part of thofewhich are ranked by Linnaeus in the orders of thehen and the goofe, and of many of thofe long-fhanked and wading birds which he places inthe order that he diftinguifhes by the name ofGrallae. **

The young of thofe birds that build their neftsin bullies, upon trees, in the holes and crevices ofhigh walls, upon high rocks and precipices, andother places of difficult accefs; of the greater partof thofe ranked by Linnaeus in the orders of thehawk, the magpie, and the fparrow, feem to come