Inverse double entry system for recording data increasing in geometrical progression

摘要

The system comprises a chart (1) in the shape of a circle with a central point (2) marking the starting point for the date. The circle is divided into a small segment (4) between two radii (3), and a larger one (7) making up the remainder of the circle. Each segment is divided into a number of rings (7) by arcs (8), and each ring is divided by radial lines into sections, with each ring of increasing size having two sections to every one in the preceding ring. When marked with data which increases in a random manner a pattern created by the completed sections can be compared with others in different parts of the chart.