... rotations and combinations of rotation and translation, such as rolling motions, are very many. We would emphasize here the dynamic definition of moment of inertia, I Fh/a rather than the one so frequently given importance for computational purposes, Smr^{2}. Quantitative experiments are furnished by the rotational counterpart of the Atwood machine. Lecture demonstrations for several talks abound: stability of spin about the axis ... — College Teaching - Studies in Methods of Teaching in the College • Paul Klapper