(Kymographion No. 210)
Inside Cover of 1903 Zimmermann Catalog. The 1903 Zimmermann
Scientific Instrument Catalog uses the "Ludwig-Baltzar" kymograph
as an emblem of its provenance. The Zimmermann firm, founded in
1887, when the firm of Baltzar and Schmidt ended, shows this
standard of a variable-speed kymograph. Carl Ludwig, who had
initiated the labeling of such devices as "kymographs" in 1846, had
apparently designed this device between 1865 (when he arrived in
Leipzig) and 1876 (when Cyon shows the device) and commissioned the
precision machinist ? Baltzar to produce it. While the Verdin
kymograph could be either horizontal or vertical (the stand,
however was different in the vertical position), and could be run
at three different speeds, the Baltzar device provided continuous
speed variation by positioning the driving disk at any position of
the driven disk and provided firm mounting in either horizontal or
vertical orientation through removing the mounting screws and
reconnecting the drum to a horizontal bracket which was supplied.
An indication of modernity in this catalog is shown by the use of
the Jugendstil (Art Nouveau) decoration around the kymograph and
the ownership of the right to produce the apparatus is shown by the
"E. Zimmermann" and "Leipzig" shown in large block letters on an
older illustration..
(recording)
Source: Zimmermann, E. (1903). XVIII. Preis-Liste ber
psychologische und physiologische Apparate. Leipzig: Eduard
Zimmermann. Inside Cover.