The SciencesPractical Experiments in Magnetism, with Special Reference to the Demagnetization of Watches.--No. 2By Alfred M. Mayer on October 4, 1879AdvertisementABOUT THE AUTHOR(S)Recent Articles by Alfred M. MayerAn Apparatus to Show, Simultaneously to Several Hearers, the Blending of the Sensations of Interrupted TonesStudies of the Phenomena of Simultaneous Contrast Color; and on a Photometer for Measuring the Intensities of Lights of Different ColorsStudies of the Phenomena of Simultaneous Contrast Color; And on a Photometer for Measuring the Intensities of Lights of Different Colors