In 1877 the maximum annual output for the mines was attained, being $3 6, 3 01, 537.
The output for the year is less than 4000 tons.
Since high average speed on a line with frequent stops depends largely on rapidity of acceleration, the tendency in modern equipment is to secure as great an output of power as possible during the accelerating period, with corresponding increase in weight available for adhesion.
The value of the output in 1905 was £226,110.
At Lodz alone the workmen, in great part Germans and Jews, number between 50,000 and 60,000, and the total output of the factories is estimated at £9,000,000 to £10,500,000 annually.