关于垂直分量磁变仪的灵敏度问题

目前国内地磁台垂直分量磁变以的灵敏度都普遍偏低，不能适应一些研究工作的需要，必须予以适当的提高，本文在基本不改变仪器固有灵敏度的前提下，采取记录光线二次反射法，以提高仪器的记录灵敏度，利用这种方法既使仪器的灵敏度提高一倍同时又保证了仪器原有的稳定性。

On the sensitivity of vertical Intensity variometer

At present the sensitivity of vertical intensity variometers is generally rather low in the geomagnetic stations of China.They do not satisfy demands of some research works and so must be properly improved.In this paper we describe a method to improve the recording sensitivity by twice reflections of light ray without changing the inherent sensitivity of the instrument. By this way, we not only increase the sensitivity farice, but also keep the original stability.