There is often an accumulation of refuse ice taken from the channel and thrown on the ice not far away. Ice cakes sometimes slip from the grapples on their way up the incline, and slide down, striking with great force at the foot of the incline. All these, and other sources of wear, on the ice, make it important to provide some protection to the sides of the channel, and, as the edges soon dip below the surface of the water, a footing or walk for the channel men. Where elevating by means of grapples, it will be found a convenience, and often the means of avoiding delays, to have a water box or trough sunk in the channel, at a depth to admit the cakes passing freely on to the lower end, and yet near enough the surface to prevent the cakes ducking, or dodging under, when pressed forward from the rear. The jackman, as the slack is taken out of the line and the pull is felt, bears a firm grip on the handle of his grapple, and, at the same time, bears down heavily, and ducks the heel of the cake, engaged by the grapple, under the water. The men who are placing the cakes for the jacks, if the ice is heavy, bear down on the cake with their pike poles at the same time, to prevent the last cake from being ended over. The water box is necessary, at these times, to steady the cake below, and prevent it sinking too deep. Several cakes are usually run up at one trip. A sharp lookout is necessary on the part of the jackman, and some experience is required to become an adept at handling the grapple. Serious accidents have resulted from careless or ignorant methods, and caution should be observed by all who are employed about the field, incline, or ice house. The construction of the water box varies with the depth of water and amount of ice run over it. Usually it is of a temporary character, and renewed each year. Order and a thorough system should be carefully adapted to the work on the field and in the house, by every ice harvester. Details, fully worked out, and the plan once in force, it should be strictly observed by the proprietor, and exact compliance insisted upon from all employes. Unless discipline is maintained, especially on large fields, much loss of time and money will result, and life and limb be jeopardized.