The eleventh annual Crimson Confidential Guide to Courses is concluded with today's issue. Upperclassmen must file study cards before 5 o'clock today in University C.

Physics B

All men who intend to concentrate in any of the sciences and have not had any courses in physics, as well as men who wish to pass their science requirement with any benefit, will find Physics D an excellent course.

Physics B is an introductory course for beginners. Since those who pass the course with honor grades may go on to the more advanced courses without taking Physics C, considerably more ground is covered than in the usual preparatory physics course. In addition to the regular lectures three days a week, a two hour laboratory period is held weekly. Last year both the lecture-room and the elementary laboratories were rebuilt and largely re-equipped so that now both the lecture and the laboratory experiments are done more effectively.

The nature of the work in this course is both theoretical and practical. The theoretical end will undoubtedly prove more interesting than the problem work, although students with mathematical inclinations will find the latter well worth while. Although neither deep nor intensive, Physics B is an excellent stepping stone to further studies in the physical sciences.

Physics C

Physics C is intended primarily for those students who have had a high school course in Physics and intend to go on in the subject or who are concentrating in one of the related sciences such as Chemistry or Astronomy. It cannot be taken without a previous knowledge of the subject. It is practically necessary for those going on in the subject, the only alternative being Physics D, in which an A or a B is required for concentration in Physics. Physics D gives a more comprehensive and general view of the subject, and is intended for those who do not expect to take further courses in the subject. Those who are taking Physics as a pre-Medical School requirement or for any similar reason should by all means choose the latter rather than the former course because it covers practically the same ground, but omits much of the dull detail, and is therefore considerably easier.

Physics D

This course, though listed as open to Freshmen, is really well worth the study of men in the two higher courses who realize the importance of a slight touch of the scientific knowledge, where time does not permit concentration in some science. In Physics D the lectures and demonstrations are of a high order, and while the underlying thought of the course is that men taking it are not primarily going on to advanced scientific work, the course is an entirely satisfying course, with Professor Crawford's stimulating lectures a pleasant guide to the sometimes involved paths of the subject. Laboratory work has been revised, with comprehensive and improved apparatus available to the men in the course.

Physics 1

This course is highly recommended not only to the concentrator in physics, but to anyone who can meet its modest requirements. It provides a satisfying half year in which the student can cash in on his hard-earned elementary knowledge, and receive a vivid though simplified impression of the most interesting "Modern Developments in Physics."

The material is neatly organized and consists of a logical, though not chronological, account of physics, beginning with the kinetic theory of gases and ending with spectroscopy and a discussion of the periodic table of the elements. Three weeks are spent in introducing the basic idea of the quantum theory, as it is evidenced in the photo-electric effect and the spectrum of hydrogen. Each experiment is described and demonstrated prior to the discussion of the theory which explains it. Agreement between theoretical and experimental results is carefully tabulated throughout. The mathematics is limited to algebra; integral signs are banned in order that the nonmathematical student may feel at home. There is a reading period.

Physics 2a

He who is not discouraged by the somewhat dull study of lenses, undertaken in the first three weeks of Physics 2a, will find the rest of the course instructive. Some time is spent in a practical discussion of color effects and photography before more theoretical though elementary considerations of the phenomena of physical optics are taken up. There are five three hour laboratory periods. The scientific student will continue with 2b, and remember 2a as a pleasant introduction to the study of light. The student whose interests are not primarily scientific will do better to take Physics 1.

Zoology 1