For+the+contract+of+contract+of+works+public,+the+consent+not+can+form+on the+base+of+writings+subsequent+attitude+as+proposal+and+acceptance+between+absent;+the same+principle+apply to apply A+even+to+compromise+concerning+le+quarrels+relative+a+such contract,+which+therefore+not+can+validly+conclude+with+the+proposal+and+the subsequent+acceptance+of+use+of the+tool+arbitration.