Acute lymphoblastic leukemia and acute myeloid leukemia are common leukemias in both children and adults. The weight member includes at least one solder channel for receiving solderable filler. These time signals correspond to events which are basically periodic in occurrence. Leveling attachments may optionally be mounted to the cultivator frame, along with additional field working tools. A sloping grove in the bottom of each channel engages a projecting ramp feature on the base of the mating blade received therein to cam the blade outwardly and thereby create a tight fit of the dovetail portions and to lock the blades in position. The voltage output circuit is connected to the secondary coil.