STUDIES ON X-AGENT

XVIII. EFFECT OF X-AGENT ON SOLUTIONS OF METHYL RED AND OTHER SUBSTANCES

抄録

It has been found that solutions of various colored substances, such as methyl red and phenolphthalein, are under the influence of an unknown physical factor (X-agent). The color intensities of dilute solutions of these substances are changed unsystematically by the agent, just like the turbidities of protein solutions or of kaolin suspensions with which a series of experiments have previously been performed.
The penetrating power of the X-agent involved in the color change proves to b extremely great. A 10-cm lead shield fails to inhibit the change of the color.
The X-agent which can affect the color intensity appears to be emitted from material substances, such as water and lead. The emission is frequently distinct on the north side of the substance.
The X-agent fluctuates remarkably in its intensity with time. The fluctuation tends to occur with periods of a few days not only in quantity but in quality. With such a fluctuation of periods of a few days, the agent seems to undergo a seasonal variation, exhibiting the highest peak of strength in the late spring or the early summer.