ery visible evidence of its radiation. I do not like level of the water down below the level of the pipes which use of a prism of flint glass instead of this prism of bisulphide to use the thermo-electric pile in this experiment; but I have project up into the chambers. G is a cock for admitting… … all I will send the light through a single prism, thus, which incompetent to excite vision. These are what are called in- In operation a pump, II, Fig. 1, forces the water admitted gives this wonderful, rich display of colors upon the screen. visible rays. Before I proceed further I should like to…
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