THREE:He had been uneasy because he experienced no disagreeable consequences of that blow, and had therefore consulted the doctor at Bilsen, who thought that only his excited nerves had enabled him to withstand such a blow. Both had been locked up a couple of hours and their bicycles had been taken away, as also their papers. Mr. van Wersch, however, had an acquaintance at Bilsen with whom he and his companion found lodgings, and whither he was good enough to take me as well.
THREE:Third. Machinery for applying power.
THREE:Gravity, or "overshot" wheels, as they are called, for some reasons will seem to be the most effective, and capable of utilising the whole effect due to the gravity of the water; but in practice this is not the case, and it is only under peculiar conditions that wheels of this class are preferable to turbine wheels, and in no case will they give out a greater per cent. of power than turbine wheels of the best class. The reasons for this will be apparent by examining the conditions of their operation.
TWO:Platens as a rule run back at twice the forward or cutting movement, and as the motion is uniform throughout each stroke, it requires to be stopped at the extremes by meeting some elastic or yielding resistance which, to use a steam phrase, "cushions" or absorbs the momentum, and starts the platen back for the return stroke.