The passage describes a series of experiments conducted to test the theory of color perception and the kinetic theory of gases. In the first experiment, a disc with black and white halves and three black bands was rotated at different speeds. The results showed that the colors at the borders of the bands changed with the direction and speed of rotation, indicating that the effect was not due to irradiation but possibly to the theory proposed by Prof. Living, where colors appear and disappear based on the percentage of ethereal vibrations cut off. In the second experiment, the speed of rotation was varied, and the colors of the bands changed from red to green to blue to violet and back, supporting the theory that the colors are not due to a fixed percentage of vibrations but rather to the dynamic nature of the phenomenon. The third experiment used a disc with white lines on a black background, which produced different colors compared to the black lines on a white background, suggesting that the colors are mixed with white or black. The passage also includes a discussion on the kinetic theory of gases, where Arthur Schuster argues that the number of spectral lines does not necessarily correspond to the number of degrees of freedom, and that the existence of "electrons" implies a restricted number of degrees of freedom. Finally, there is a brief mention of a debate on acquired characters, where Arthur Schuster criticizes Prof. Lankester's stance on the inheritance of acquired traits, suggesting that the question is not settled and that further investigation is needed.The passage describes a series of experiments conducted to test the theory of color perception and the kinetic theory of gases. In the first experiment, a disc with black and white halves and three black bands was rotated at different speeds. The results showed that the colors at the borders of the bands changed with the direction and speed of rotation, indicating that the effect was not due to irradiation but possibly to the theory proposed by Prof. Living, where colors appear and disappear based on the percentage of ethereal vibrations cut off. In the second experiment, the speed of rotation was varied, and the colors of the bands changed from red to green to blue to violet and back, supporting the theory that the colors are not due to a fixed percentage of vibrations but rather to the dynamic nature of the phenomenon. The third experiment used a disc with white lines on a black background, which produced different colors compared to the black lines on a white background, suggesting that the colors are mixed with white or black. The passage also includes a discussion on the kinetic theory of gases, where Arthur Schuster argues that the number of spectral lines does not necessarily correspond to the number of degrees of freedom, and that the existence of "electrons" implies a restricted number of degrees of freedom. Finally, there is a brief mention of a debate on acquired characters, where Arthur Schuster criticizes Prof. Lankester's stance on the inheritance of acquired traits, suggesting that the question is not settled and that further investigation is needed.