Part, §

 1 Pre,  2|    weight of the water in the pumps, proved to be so insufficient
 2   I, 11|      the water-columns in the pumps and the friction.~ ~The
 3   I, 11|      the water-columns in the pumps down in the mine, which
 4   I, 12|    clear from water, only the pumps will have to be reduced
 5  II, 20|       by means of two sets of pumps 8 inches in diameter, with
 6 III, 35|      draw water of six 9 inch pumps, not spending more energy
 7 III, 35|     by more than 12 nine inch pumps; for as the power of the
 8 III, 35| water-columns in 12 nine inch pumps, each 30 feet high, is only
 9 III, 35|       could work 14 nine-inch pumps, which would be able to
10 III, 50|     year, not to speak of the pumps which, constructed in the