Section 1 Ring Supported Column Section 2 Buckling of Column with Two Non-linear Suppertes Section 3 Buckling of Column with Three Non-linear Suppertes Section 4 Buckling of Column with One Non-linear Support Section 5 Buckling of Column with One Non-linear Support and Initial Deflection Section 6 Buckling of Column with ()ne Non-linear Support, Initial Deflection and Elasticity of Machine