Original sentence: Evans in his book continues to say that in 19 cases they were either mercury vapor or sodium vapor (i.On the flip-side of this Evans in his book on page 16 counters: But as the testimony shows, even if we allow the coincidence in place and time, this effect could account for only a small fraction of the reported cases.What about when a witness extinguishes a whole batch of street lights: are we to conclude that the whole batch was purchased together, and so shared the same life-span, and such was the perfection of their manufacture, that they all reached their death-point simultaneously.Yet even if we allow that, there is still the fact that some "SLIders" extinguish a row of street lamps in sequence, each one going out as the witnesses nears it: it is asking too much to suppose that a series of lamps would have been arranged in order of their life-span....arc lamps) and that 29 other cases none reported it happening in tungsten or incandescent bulbs