A series of four lectures will be given in the lecture-room of the Jefferson Physical Laboratory, Friday evenings at 7.30, beginning March 16th, on scientific subjects. The lectures will be very interesting, as they are to be given by members of the faculty who are well-known for their interest in physical research. The subjects are as follows:

March 16.- Spectrum Analysis, illustrated by experiments. Professor Trowbridge.

March 23.- Bridge Building, illustrated by photographs. Professor Chaplin.

March 30.- Electric Lighting, illustrated by experiments. Dr. Hall.

April 13.- Matter in Motion, illustrated by experiments. Dr. Whiting.

The course will be open to the public.