relations between the rate of wage and the market price, has been the sliding scale. The sliding scale aims at the establishment of a numerical ratio between the rate of wage and the price of coal. At first this was sometimes determined by the following method: five consecutive years are taken, in the course of which considerable fluctuations have taken place in the market prices and the price of coal (the latter brought about by strikes, agreements, and arbitration). These five years are divided into twenty quarters; the average price of coal and the average rate of wage for each quarter is ascertained, and by this means the numerical ratio of the two amounts to each other is determined. The average of these numerical ratios is taken to express the normal relation which must exist between the rate of wage and and the market price of coal. Upon the scale thus determined the average market price for all coal produced in the district for the last preceding quarter is reckoned. The required numerical normal proportion between prices and wages is now computed on this basis, and the rate of wage for the current quarter thus determined. This calculation takes place for every ensuing quarter. These calculations are made by two qualified auditors, who are appointed by the labourers' union and the employers' union. The books of all the works are submitted to these experts, who are bound to the strictest secrecy as to the information thus obtained. They confine themselves to the task of attesting: (1) that during the latest preceding quarter, the average price of coal in the district is such and such; (2) that such and such a rate of wage results therefrom. In this way the workmen obtain, without the necessity of negotiation, of strikes, or arbitration, the same wages which they could not otherwise have obtained except by repeated efforts. The numerical ratio between wages and market prices is generally fixed for two years. After that time each party may give a half year's notice; but during six years, the first sliding scale introduced has only been subjected to very slight alterations. Notice will shortly be given by the employers in Northumberland and the miners in Durham. Mr. Dale believes that this double notice does not aim at the abolition of the system, but only at revision of the existing scale. In the districts where for the moment the sliding scale has been abolished, an attempt is being made to take the nearest conjectural price of the current quarter as the basis, instead of the price of the previous quarter. In this way the workmen would receive official information as to the market prices, which would be a great advantage, for strikes are most frequently caused by the ignorance of the workmen as to the real position of the coal trade. As to local questions which do not affect the whole district, they are settled by so-called 'joint committees,' or mixed commissions formed by