Then other conditions consequent upon the fact that, the link forms part of a kinematic chain operate to enable b tobe fixed.
No better testimony to the value of the quaternion method could be desired than the constant use made of its notation by mathematicians like Clifford (in his Kinematic) and by physicists like ClerkMaxwell (in his Electricity and Magnetism).
There is a corresponding kinematic peculiarity, in that the connection is now not strictly rigid, an infinitely small relative displacement being possible.
From the purely kinematic point of view, the t of our formulae may be any continuous independent variable, suggested (it may be) by some physical process.
It follows, by the preceding kinematic theory, that the mass-centre G of thc system will move exactly as if the whole, mass were concentrated there and were acted on by the extraneous forces applied paralle to their original directions.