EditorialThe oldest form of the magnometer, Magnetometer with magnetic bar on the left and telescope on the right, Fig. 402, p. 409, 1899, E[rnst] Gerland; F. Traum?ller: Geschichte der physikalischen Experimentierkunst. Leipzig: Engelmann, 1899.
EditorialMagnetometer from Gauss, Magnetometer in which the mirror is fixed to a rod, Fig. 403, p. 409, 1899, E[rnst] Gerland; F. Traum?ller: Geschichte der physikalischen Experimentierkunst. Leipzig: Engelmann, 1899.
EditorialReve de jeune fille. - The maid's dream. - Des Madchen's Traum., Attributed to S.P. Christmann (German, active 1860s - 1870s), about 1865, Hand-colored albumen silver print.