PROF. ROBERTSON'S observation 1 of a maximum at 2212 A. in the spectrum of an arc between cadmium electrodes which is much more intense than the cadmium band at 2125 is very interesting.

Seven cities dispute the right of having given birth to the immortal Homer, and seven men claim the honor of having discovered cadmium. A learned German has tried to show that Homer was a myth.

A simple structural tweak has dramatically enhanced the colour clarity and stability of heavy metal-free blue quantum dots.