MICROFICHE REFERENCE LIBFUUW - Cd3wd.com

126water lifting device. Animals are usually allowed to work in 3 hour shiftssince, like humans, they tire and produce less work.Table 5.2 suggests some of the typical water lifting applications foranimal power, including common transmissions. In general, animals arelimited in such applications to pulling with a harness or pushing with.,ctheir feet by means of a treadmill. However, a wide variety of mechanicalsystems to connect this power to water lifters are utilized.Schioler makes a suggestion for improving two-animal sweeps. Whentwo animals are harnessed side-by-side and connected to a single sweep arm,the outside animal must walk faster than the inner one, thus they tend toimpede each other. If, however, the two animals are harnessed individualyto two separate arms placed diametrically across the sweep, they will notinterfere with each other and can walk at the same pace--see Schioler(1957), p. 22.5.4 Natural"Natural" prime movers are the forces of nature which, without beingconverted to a different form, can provide energy to drive a water lifter,i.e., as opposed to mechanical drivers (see Section 5.2.4) which requirethe consumption and/or conversion of combustible fuels or electricity.Except for possibly having to pay a "users right" for some water and geothermalsources, the natural forces of wind, water, sun, and geothermalheat provide free forms of energy, This can allow applicable water liftersto operate with relatively low running costs.