The Natural Science Society

Corry has been librarian of the society since this post was created and has done much for the music of the School in this capacity. Davison was, of course, a mainstay of the Glee Club and Choir, and his departure is a great loss to the Society.

At the beginning of the term, Norwood was appointed to the Committee.

Committee:

Chairman: J. T. WALL, Esq., M.A., B.Sc.

Secretary : T. B. BOULTON. Dr. B. G. WHITMORE, M.A., B.Sc.

Owing to House Concerts and " Trial EXams," the activities of the Society were somewhat curtailed this term, but an interesting lecture was given by J. D. Bulmer on " Radio " on the 22nd March.

This lecture was particularly well illustrated by cleverly-arranged demonstrations, which must have occupied a large part of the lecturer's time.

Bulmer commenced his lecture with a complicated piece of mathematics to prove that a maintained oscillation could be set up in a circuit containing a coil and condenser. We were told that such a circuit was the basis of all wireless sets.

The lecturer then went on to describe how an oscillating circuit emitted trains of wireless waves. These waves will set up similar oscillations to those in the original circuit if they pass near a circuit of similar construction to the original circuit. This, Bulmer told us, is the principle of wireless transmission and reception.

We were now told that the alternating currents set up in the receiving circuit must be rectified into direct currents before they could be used to record sound. The early experimenters used special crystals which only allow currents to pass through them in one direction. Nowadays, however, the thermionic valve is used.

Bulmer then drew a circuit „containing a valve and proceeded to demonstrate its rectifying properties on his apparatus.