 This plaster is composed of alluvial soil, mixed with a portion of cow-dung to prevent it from cracking, and with chopped grass to enable it to adhere, the coat being put on with a light spade and smoothed over with a plasterer's trowel.It is run over occasionally afterwards with the trowel to fill in the cracks; and on being quite dry, whitewashed with lime, plaster of Paris, or apple-tree ashes and sour milk, the latter forming a tolerable substitute for lime as whitewash.The interior might have a coating of plaster made from a variety of available ingredients