《四川地震》在1985年第1期43页上刊登的“笔绘记录地震仪极性鉴定简易法”(下称“简易法”)。作者在文中给出了试验电路及鉴定极性的方法。但我认为作者忽视了监督线圈Rs_(13)的极性在“简易法”线路中对摆的极性所起的控制作用。因摆的运动是由微电机输出的电信号通过在磁缸中的Rs_(13)使摆产生运动。故Rs_(13)的运动方向就控 “Sichuan Earthquake” in 1985 No. 1 43 pages published in the pen drawing recorded seismograph polarity identification simple method “(hereinafter referred to as” the simplified method “). In the paper, the author gives the test circuit and the method of identifying the polarity. However, I think the author neglected to control the polarity of supervisory coil Rs_ (13) on the pendulum’s polarity in the ”simple method" circuit. Because of the pendulum motion is generated by the micro-motor electrical signals through the magnetic cylinder Rs_ (13) so that pendulum movement. So Rs_ (13) of the direction of movement on the control