Correction to "Sinusoidal burst generator for auditory evoked response research\´\´

Summary form only given, as follows. In a recent short communication named above (ibid., vol. BME-17, pp. 74-76, January 1970), there are several corrections to be made in the figures. In Fig. 1, page 75, in the base circuit of Q4 of the modulator, the 6.8 kΩ resistor, presently returned to -12 volts, should have been returned to ground. The junction of the 2 kΩ resistor in the Q4 base circuit and the 2.4 kΩ emitter resistor should have been +12 volts instead of ground. In Fig. 3, page 76, the HD1810 diode connected to the kQ2 input of the flip flop and to the base of the 2N3638 transistor should have been inverted.