TWO MEMBERS OF SYMPHONY AID SAUNDERS IN LECTURE

Assisted by two artists from the Boston Symphony Orchestra, Professor F. A. Saunders of the Physics Department gave the third of a series of lectures on "Sound and its Relation to Music" in the lecture room of the Jefferson Physical Laboratory yesterday afternoon at 4.30 o'clock.

Professor Saunders exhibited a "violin, consisting simply of a string undertension, which gave out so little tone that he observed that its place was in an apartment house.

A phonodeik, consisting of a small glass diaphragm whose vibrations were magnified 40,000 times, transferred by means of a revolving mirror, the notes produced by the French horn and the clarinet on the screen as wavy lines.

The subject for the last lecture of the series which will take place next Tuesday afternoon at 4 o'clock, is "Music and Architecture", or the relation between music and the room in which it is played.