Note 49 — Front matter (continued 2)
Reading edition
See E. Marx, Phys. Zeitschrift, Vol. II., p. 249; Science Abstracts, Vol. IV., p. 471. See also German Patent Specification No. 121,663, Class 21a.
Reading edition
See E. Marx, Phys. Zeitschrift, Vol. II., p. 249; Science Abstracts, Vol. IV., p. 471. See also German Patent Specification No. 121,663, Class 21a.