CATALOG 1952-1953 EM. 566.-Theory of Elasticity. 3 hours. 3 credits. Prerequisite: MS. 420. Offered 1. Plane stress and plane strain, stresses and strains in three dimensions; equations of equilibrium; principle of compatibility; Saint Venant's principle; regular and polar representation of stresses and strains; stresses in plates and shells. Application to prac- tical problems. EM. 567.-Theory of Elastic Stability. 3 hours. 3 credits. Prerequisite: MS. 420. Offered 2. Lateral buckling of beams; bending and buckling of thin plates and shells; shear buckling; general failure of columns by bending, twisting, or shear; buckling at stresses above elastic range. Application to practical problems. EM. 568.-Mechanics of Orthotropic Materials. 3 hours. 3 credits. Pre- requisite: MS. 420. Offered 3. Plane stress and plane strain; stresses and strains in three dimensions. Equation of equilibrium; Mohr's circle; form factors; shear; direct compression; combined stresses; practical applications. EM. 569.-Elastic Energy Theory. 3 hours. 3 credits. Prerequisite: EM. 367. Offered 1. Statically determinate and statically indeterminate frames; statically determinate and statically indeterminate beams; combined stresses; deformation due to shear; resil- ience; influence lines; theory of least work; columns. EM. 570.-Photoelasticity. 2 hours and 3 hours laboratory. 3 credits. Prerequisite: EM. 566. Offered 2. Stress-strain relations; stress at a point, differential equations of equilibrium; fundamentals of optics; double refraction; polarized light; stress optic law; stress pat- terns; isoclinics and stress trajectories; principle shear and normal stresses; slope equilibrium method; shear difference method. Laboratory work in making models, experimental stress determination. ENGLISH Instructional Staff 1951-52 Robertson, C. A., Head, Baughan, D. E., Bigelow, G. E., Boone, L. P., Bowers, R. H., Childers, W. C., Clark, W. A., Congleton, J. E., Conner, F. W., Cox, E. H., Fain, J. T., Fogle, S. F., Gehan, F. E., Hart, T. A. E., Herbert, T. W., Hodges, J. R., Kirkland, E. C., Lytle, A. N., Morris, A. C., Mounts, C. E., Murphree, A. A., Oras, A., Pyles, T., Ruff, W., Stryker, D., Vowles, R. B., Warfel, H. R., Waters, L. A., Wilson, J. L., Wise, J. H. Students intending to major in English in the College of Arts and Sciences should, at the earliest possible opportunity, consult with the student counsellor of the Depart- ment, and plan their programs. The Departmental Major: For the departmental major the following courses, or their equivalents, are required: EH. 201-202, one semester of Shakespeare (EH. 301 or EH. 302), and EH. 406. At least half of the major program should be in courses numbered 300 or above, and at least six hours should be in courses numbered 400 or above. EH. 255 and EH. 356 may not be counted for credit towards the minimum departmental major. A foreign language should be elected at least as early as the sophomore year. In exceptional cases, specified departmental requirements, including prerequisites, may be waived by consent of the departmental adviser. The statement "Offered 1" means offered first semester; 2, second semester; 3, summer session.