To make the preceding paragraph a little plainer, take the instance of a hundred pounds of first-class wool imported under the present duty, which is 11 cents a pound. That would make the duty on the hundred pounds $11. The merchantable part of the wool thus imported is the weight of the wool of this hundred pounds after scouring. If the wool shrinks 80 per cent, as some wools do, then the duty in such a case would amount to $11 $11 on 20 pounds of scoured wool. This, of course, would be prohibitory. If the wool shrinks only 50 per cent, it would be $11 on 50 pounds of wool, and this is near to the average of the great bulk of wools that are imported from Australia, which is the principal source of our imported wool. These discriminations could be overcome by assessing a duty in ad valorem terms, but this method is open to the objection, first, that it increases administrative difficulties and tends to decrease revenue through undervaluation; and, second, that as prices advance, the ad valorem rate increases the duty per pound at the time when the consumer most needs relief and the producer can best stand competition; while if prices decline the duty is decreased at the time when the consumer is least burdened by the price and the producer most needs protection. Another method of meeting the difficulty of taxing the grease pound is to assess a specific duty on grease wool in terms of its scoured content. This obviates the chief evil of the present system, namely, the discrimination due to different shrinkages, and thereby tends greatly to equalize the duty. The board reports that this method is feasible in practice and could be administered without great expense. The scoured content of the wool is the basis on which users of wool make their calculations, and a duty of this kind would fit the usages of the trade. One effect of this method of assessment would be that, regardless of the rate of duty, there would be an increase in the supply and variety of wool by making available to the American market wools of both low and fine quality now excluded. The report shows in detail the difficulties involved in attempting to state in categorical terms the cost of wool production and the great differences in cost as between different regions and different types of wool. It is found, however, that, taking all varieties in account, the average cost of production for the whole American clip is higher than the cost in the chief competing country by an amount somewhat less than the present duty.