context: In 1937, at a luncheon in his honor concerning the death ray, Tesla stated, "But it is not an experiment ... I have built, demonstrated and used it. Only a little time will pass before I can give it to the world." His records indicate that the device is based on a narrow stream of small tungsten pellets that are accelerated via high voltage (by means akin to his magnifying transformer).
question: ఏ పదార్థంతో మరణ కిరణాల గుళికలు తయారుచేయబడ్డాయి?
answers: tungsten tungsten tungsten