In Fig. 6, F represents the tangential force that tends to cause skidding.
From this simple lattice sphere all other Sphroidea can be derived either by radial or by tangential growth.
The tangential needles always seem to have the same shape as I have accurately described, in 1862, of Aulacantha scolymantha.
They are, in short, mountains of elevation, ridged up by tangential thrusts.
It follows that a line from B to M will always be tangential to the epicycloid.
The photographs of tangential and radial sections are life size.
Tangential, a longitudinal plane not including the organic axis.
In pine there are some 15,000 of them to a square inch of a tangential section.
At the point, A, it is moving in the tangential direction, A D.
The effect of this tangential force acting on the tide-compelling body is gradually to increase its distance from the other body.