I. & II. Illustrative of Dr. G. E. Allan's Paper on the Magnetism of Basalt and the Magnetic Behaviour of Basaltic Bars
III-XI. Illustrative of Dr. E. Weintraub's Paper on the Arc in
Metallic Vapours in an Exhausted Space.
XII. & XIII. Illustrative of Mr. C. A. Chant's Paper on the Variation of Potential along the Transmitting Antenna in Wireless Telegraphy.
XIV. Illustrative of Mr. S. J. Allan's Paper on the Radioactivity
of the Atmosphere.
XV. Illustrative of Prof. Karl Pearson's Paper on a Novel
Instrument for Drawing Parabolas.
XVI. Illustrative of Mr. T. C. Porter's Paper on a Method
of Mechanically Reinforcing Sounds.
XVII-XIX. Illustrative of Mr. S. Skinner's Paper on the Occurrence of Cavitation in Lubrication.
XX. Illustrative of Messrs. Simmance and Abady's Paper on
the Simmance-Abady "Flicker" Photometer.
XXI. Illustrative of Prof. R. W. Wood's Paper on some new
Cases of Interference and Diffraction.
XXII. & XXIII. Illustrative of Dr. W. Watson's Paper on a Quartz-
Thread Vertical Force Magnetograph.
XXIV. Illustrative of Mr. H. Darwin's Paper on an Electric
Thermostat.
XXV. & XXVI. Illustrative of Mr. J. Barnes's Paper on the Analysis of Bright Spectrum Lines.
XXVII. Illustrative of Mr. W. Bennett's Paper on Non-homocentric
Pencils, and the Shadows produced by them.