Waldron was a lifelong student of classical piano—he often played sonatas for pleasure, and recorded pieces by Chopin, Brahms, Satie, and Bartók—and he brought a classical sense of form and introspection to his solo work. Two long-out-of-print solo-concert albums— The Opening and Meditations —were recently reissued, and they bear witness, in different ways, to the dark, wintry beauty of Waldron’s art. The Opening , a fiery 1970 concert at the American Cultural Center in Paris, features six original compositions, mostly based on ostinatos—vamps that Waldron plays over and again—with small but engrossing variations in tempo, dynamics, timbre, and rhythmic articulation. (One is called “Of Pigs and Panthers,” an allusion to the war back home between the police and the Black Panther Party.) Meditations , recorded two years later at a jazz club in Tokyo, is a more contemplative affair, bookended by two of Waldron’s best-known pieces on solitude, “All Alone” and “Left Alone.” 4 Most Popular 1 Good Riddance, Tom Price. But What About the Other Grifters?
The ocean's surface is closely approximated by an equipotential surface, (ignoring ocean currents) commonly referred to as the geoid . Since the gravitational force is equal to the potential's gradient , there are no tangential forces on such a surface, and the ocean surface is thus in gravitational equilibrium. Now consider the effect of massive external bodies such as the Moon and Sun. These bodies have strong gravitational fields that diminish with distance and act to alter the shape of an equipotential surface on the Earth. This deformation has a fixed spatial orientation relative to the influencing body. The Earth's rotation relative to this shape causes the daily tidal cycle. Gravitational forces follow an inverse-square law (force is inversely proportional to the square of the distance), but tidal forces are inversely proportional to the cube of the distance. The ocean surface moves because of the changing tidal equipotential, rising when the tidal potential is high, which occurs on the parts of the Earth nearest to and furthest from the Moon. When the tidal equipotential changes, the ocean surface is no longer aligned with it, so the apparent direction of the vertical shifts. The surface then experiences a down slope, in the direction that the equipotential has risen.