. Carnegie Institution of Washington publication. Fig. 56.—Positive singular points of isogonal curves. A. Pure divergence. B. Anticyclonic spirals of northern hemisphere. C. Anticyclonic circles of northern hemisphere, cyclonic of south- ern hemisphere. D. Cyclonic spirals of southern hemisphere. E. Pure convergence. F. Cyclonic spirals of northern hemisphere. G. Cyclonic circles of northern hemisphere, anticyclonic of south- ern hemisphere. H. Anticyclonic spirals of southern 24 16 8 32 2t Fig. 57.—Negative singular points of isogonal curves. diagram to diagram represents a rota
. Carnegie Institution of Washington publication. Fig. 56.—Positive singular points of isogonal curves. A. Pure divergence. B. Anticyclonic spirals of northern hemisphere. C. Anticyclonic circles of northern hemisphere, cyclonic of south- ern hemisphere. D. Cyclonic spirals of southern hemisphere. E. Pure convergence. F. Cyclonic spirals of northern hemisphere. G. Cyclonic circles of northern hemisphere, anticyclonic of south- ern hemisphere. H. Anticyclonic spirals of southern 24 16 8 32 2t Fig. 57.—Negative singular points of isogonal curves. diagram to diagram represents a rotation of the system of isogons of 450. In all cases we can draw the short lines across the isogonal curves, and then the vector-curves. The diagrams will then show the features of the vector-field, which in the different cases corresponds to the singular point in the field of isogonal Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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