CATALOG 1952-1953 PS. 110. (Formerly PS. 226).-Agricultural Physics. 3 hours. 3 credits. Pre- requisite: C-42. Open only to University College Students preparing for ag- riculture or to students in the College of Agriculture. Offered 1, 3. The subject matter is confined to the material having direct applications in the field of agriculture. An attempt is made to give the student a working knowledge of the fundamental physical principles which he will encounter in his work in soils, agricultural engineering, plant physiology, or dairying. PS. 201.-General Physics. 4 hours and 3 hours laboratory. 4 credits. Prerequisite: C-21 and C-42. Offered 1, 2, 3. General physics for science students. PS. 202.-General Physics. 4 hours and 3 hours laboratory. 4 credits. The second half of the course PS. 201-202. Offered 1,2, 3. PS. 205.-General Physics. 4 hours and 3 hours laboratory. 4 credits. Prerequisite: MS. 105-106. Corequisite. MS. 353. Offered 1, 2, 3. Theory of mechanics, heat, sound, electricity and light. Primarily for engineering students. PS. 206.-General Physics. 4 hours and 3 hours laboratory. 4 credits. The second half of the course PS. 205-206. Corequisite: MS. 354. Offered 1, 2, 3. PS. 209.-Problems in Physics. 1 hour. 1 credit. Corequisite: PS. 205. Offered 1. Designed primarily for physics majors or other qualified students who desire more problem work than is afforded in PS. 205. PS. 210.-Problems in Physics. 1 hour. 1 credit. The second half of course PS. 209-210. Corequisite: PS. 206. Offered 2. PS. 309.-Optics. 3 hours. 3 credits. Prerequisite: one year of physics. Corequisite: Calculus. Offered 1. An intermediate course. Lenses; optical instruments; interference; diffraction; dis- persion; polarization; emission of spectra and Bohr theory. PS. 310.-Optics in the Laboratory. 3 hours. 1 credit. Corequisite: PS. 309. Offered 1. Selected experiments in refraction, dispersion, diffraction, and polarization. PS. 311.-Electricity and Magnetism. 3 hours. 3 credits. Prerequisite: one year of college physics and calculus. Offered 2. Electrostatics, dielectric theory, magnetostatics, direct current circuits, electrolytic conductivity, thermoelectric effects, electronic emission, electro-magnetics and induced e. m. f.'s, magnetic circuits, and moving charges in electric and magnetic fields. PS. 312.-(Formerly PS. 313).-Electrical Measurements. 3 hours. 1 credit. Corequisite: PS. 311. Offered 2. Laboratory practice in the theory and use of electrical instruments. Experiments in- clude high and low resistance measurements, potentiometers, ballistic galvanometer, measurements on the magnetic properties of iron, electrolytic conductivity, and vacuum tube amplifiers and oscillators. The student is allowed some choice of experiments to meet his individual needs. The statement "Offered 1" means offered first semester; 2, second semester; 3, summer session.