THE SEA-KINGS OF CRETE 
17 
MAIN DRAIN : KNOSSOS 
TERRA-COTTA DRAIN-PIPES, 3,500 YEARS OED 
"The hydraulic science of the Minoan architects is wonderful in the completeness with 
which it provided for even the smallest details. On a staircase, . . . lest the steepness 
of the gradient should allow the water to descend too rapidly and flood the pavement below, 
the runnel is so constructed that the water follows a sei'ies of parabolic curves, and the 
rapidity of its fall is thus checked by friction" (see pages ii and 12). 
