Those interested in the Student Military Instruction Camps will today have an excellent opportunity to get detailed information concerning them. Captain R. O. Van Horn, General Staff of the U. S. Army, will speak informally on the subject in the Trophy Room of the Union this afternoon at 5 o'clock. Captain Van Horn is managing the organization of the camps, and will be ready to answer all questions and to explain any phase of the topic. President Lowell is especially anxious that the plan be well supported by Harvard men, and it is hoped that a large number will attend today's discussion.