Chap. 12.]

Dutch Scoop.

93

the gutters are secured to a frame of wood which is suspended on a pinsecured to a beam, so that by pulling the cords alternately the whole maybe made to oscillate like a pendulum. Thus, when pulled to one sideone of the lowest gutters dips into water, and scoops up a portion of it'to facilitate which the end is curved ; and as it rises, the liquid runs aloncrto the farther end, and passing through the valve is retained tili the m(>tion is reversed, when it flows down to the next gutter, and passing throughits valve, is again continued in the same manner to the next; entering- atevery oscillation the gutter above, tili it reaches the highest; and fromwhich it is discharged into a reservoir, over which the last one is made toproject. A double set of gutters, as shown in the figure, was sometimesattached to the same frame, so that a continuous stream could be discharg-ed into the reservoir. Machines like the above are more ingenious thanuseful. They do not appear to have evev been extensively used, althoughthey are to be found in the Works of several old writers on hydraulics.The one represented by the figure is described by Belidor as the inven-ti on of M. Morel, who raised water by it 15 or 16 feet. Similar machine»were known in the preceding Century. A pendulum for raising water isdescribed at page 95, of the first volume of machines approved by theFrench Academy, and at page 205, is a “ hydraulic machme” by A. DeCourdemoy, similar to the one we have copied; except that square tubeswere used instead of open gutters ; they were also of equal length, andattached to a rectangular frame, but were suspended and worked in thesame manner as No. 33.

A different mode of working these machines, was devised by an Eng-lish engineer. Instead of suspending the frame like a pendulum hemade the lower part terminate in rockers like those of a cradle; theseresting on a smooth horizontal plane, a slight impulse put the whole inmotion. The lowest gutters at each oscillation dipped into the water andraised a portion, as in the preceding figure. ’

No. 34. Dutch Scoop.

Among other simple devices, is the Dutch scoop, frequently used bythat people in raising water over low dykes. It is a kind of box-shovel