Sentence:  Discover these radiations for yourself. Start slowly, say for not more than a l5 minute period. Experienced <WSD>radiationists</WSD> work for hours on certain studies but they all started gradually. First make this test for sensitivity. Stand upright, relax and face due West. Place your left hand flat over your solar plexus — the place where the ribs join — the fingers touching each other. Now suspend the  pendulum from the right hand about nine inches from the left hand and opposite the center ... 
Meaning of the word marked with <WSD> tags:  One who believes in or claims to practice extrasensory perception by sensing radiation.