Brief Description of Ranger Lunar Seismograph

It is hoped that before long the United States will safely land a Ranger instrument package containing a seismometer on the Moon. Waves from moonquakes, if they occur, and meteoric impacts will be detected, telemetered to Earth and registered for study. From the seismograms may be deduced information concerning the Moon's near surface and interior structure. This paper is an abbreviated description of instrumentation for the experiment.