In other words, the ratio of r3 to T2 for every planet is the same.
H is the head, bearing the tentacles T1 and T2, of which the upper pair have the eyes, E.
Let v1 denote the velocity of T1 at any given instant; v2 that of T2.
The two thermometers are indicated as T1 and T2 and are inserted in the ingoing and outgoing water respectively.
Then to every such strip will correspond a strip of equal length x of the figures described by T1 and T2.