I have shielded the sensitized plate by a
wooden hood which permits no light to strike it except the slender
ray that is doing the work. The plate moves across the field
slowly, its speed regulated by the fly-wheel. Don't you think it
is neat and delicate? All these movements are produced by one of
the finest little electric motors I ever saw."
I could not get the idea of the revolvers out of my head so
quickly. I agreed with him, but all I could find to say was, "Do
you think there was more than this one whom they call the Chief
engaged in the shootings?"
"I can't say absolutely anything more than I have told you, yet,"
he answered in a tone that seemed to discourage further
questioning along that line.
He continued to work on the delicate apparatus with its thread
stretched between the stationary magnets of the galvanometer, a
thread so delicate that it might have been spun by a microscopic
spider, so light that no scales made by human hands could weigh
it, so slender that the mind could hardly grasp it.
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