A coating composition comprising a film forming binder ofa. Depending upon the output signals of the plurality of sensors a depth field of the scene is estimated, and this estimation provides a basis for the luminance adjustment on the scene picked up as an image while illuminated by the flash device. Each of the compartments is intended for performing at least one of the following functions: a) drawing in andor compressing gas required for the combustion; b) bringing the fuel to combustion; c) producing work; and d) discharging combustion gases. , matching configurations of the counter units with those of the wave sources, matching shapes of such counter waves with shapes of the harmful waves, and the like. An alternative embodiment is disclosed wherein the balls 16 move through the gutter 18 via gravity.