IT may interest some of your readers to know that they can for themselves observe in the most accurate manner the motion of the compound pendulum described by Mr H. Airy * by merely attaching the ...

The aerodynamically-designed compound pendulum offers highest rigidity in the direction of the impact and practically eliminates any windage losses. Pendulum capacity is easily altered by ...

but the beauty and perfection of the results obtained by the compound pendulum of Tisley, and later by the twin elliptic pendulum of Goold, have made the subject sufficiently attractive to be ...