Abstract
Here it is pointed out that the vertical influence of a mountain range is comparatively greater than usually considered, and the horizontal influence particularly so; the current bending on both sides is deduced from the alternative change of signs of its horizontal divergence, namely the horizontal convergence proceeds the horizontal divergence on the weather side, and vice versa on the lee side. These two influences are suggestible to be applied to explain the formation of westerly waves and jet streams.
