e passed by since the subject was the colors of certain bodies are influenced by a great with the measuring tube, B, so that the observer is first presented, without active measures having been many circumstances ; and even under the most favor- enabled, from a certain distance, to look simul-… … {he same opening, a narrow tube is intro- heat, but they have been given but once in 05 years. pared, but the degree of difference between the two duced into the movable end of the measuring tube, As you are better posted on this subject than any one colors cannot be determined. For these reasons…
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