Ch. 1 comprises the motivation to the study, the description and the historical background of the problems considered in other chapters. Ch. 2 includes all basic definitions, the governing equations and techniques that are exploited in the rest of dissertation. In ch. 3, the natural buoyancy effect on 2nd-grade fluid along a vertical plate is analyzed. The asymptotic method in conjunction with Pade approximation, the LNS local nonsimilarity solution method and Keller Box technique are exploited to get the solution. Study of the natural buoyancy for 2nd -grade flow along a heated vertical...