The Collaborative International Dictionary
Ergograph \Er"go*graph\, n. [Gr. ? work + -graph.] An instrument for measuring and recording the work done by a single muscle or set of muscles, the rate of fatigue, etc. -- Er`go*graph"ic, a.
Wikipedia
An ergograph is a graph that shows a relation between human activities, or agricultural/climate factors, and a seasonal year. The name was coined by Dr. Arthur Geddes of the University of Edinburgh. It can either be a polar coördinate (circular) or a cartesian coördinate (rectangular) graph, and either a line graph or a bar graph.
In cartesian form, the X axis is marked for the months of the year, and the Y axis is marked with the scale(s) of the activity/activities. For example, in the ergograph to the right, the Y axis is marked with both temperature and rainfall/sunshine scales.
In polar form, the months of the year are marked around the circumference, forming 30° sectors. Concentric lines display the proportions of time (in hours per day) devoted to each of the activities. The time scale, ranging from 0 to 24 hours per day, is along the radius of the circle, and is a square root scale. This form of an ergograph is also known as a polar line graph or (because the data form "bands" on the graph) a polar strata graph or polar layer graph, the "polar" denoting the system of polar coordinates used on the graph.
Ergographs can record human activities or agricultural/climate information, such as rainfall, temperature, humidity, crop types, and crop acreage.
Usage examples of "ergograph".
Lucky threw in the Ergograph connection and the energy pattern traced itself out in a series of lines.
Professor Tarchanoff made use of the ergograph of Mosso, and found that if the fingers were completely fatigued, either by voluntary efforts or by electric excitation, to the point of being incapable of making any mark except a straight line on the registering cylinder, music had the power of making the fatigue disappear, and the finger placed in the ergograph again commenced to mark lines of different heights, according to the amount of excitation.