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Abstract: Mortality data for equipment and machinery - Methods of compiling mortality tables - Development of mortality curve types - Frequency curves of replacement of original units - Equations of the seven type mortality curves - Average life - Expectancy and probable life - Annual renewals.

Abstract: Review of elementary concepts - The algebra of matrices - Transformations - Bilinear forms and the rank of a matrix - Systems of linear equations - Congruence of square matrices - Quadratic forms - Linear vector space over a field - Determinants of square matrices - Matrices and polynomials - Special matrices.

Abstract: Selection and placement - Factors in efficiency.

Abstract: The general vacation movement - The vacation movement in the United States - The vacation movement in countries outside of the United States.