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THIS PROGRAM SOLVES FOR NATURAL CONVECTIVE STEADY LAMINAR FLOW THROUGH A VERTICAL PLANE CHANNEL. THE FLOW IS ASSUMED TO BE SYMMETRICAL ABOUT THE CENTRE-LINE. A UNIFORM WALL TEMPERATURE IS ASSUMED. THE PARABOLIC FORM OF THE GOVERNING EQUATIONS ARE SOLVED USING A DIFFERENCE TECHNIQUE WITH A UNIFORM GRID SPACING IN THE CROSS-STREAM DIRECTION.