Abstract: A coin bank with time-release lock including a housing having an openable upper end. The openable upper end, when opened, exposes a hollow interior of the housing. The hollow interior of the housing is dimensioned for holding a quantity of money therein. The openable upper end has an opening therein allowing money to be inserted into the hollow interior therethrough. A locking system is disposed within the housing. The locking system is in communication with the openable upper end. The locking system includes a first display, a second display, and a control panel. The first display and the second display are programmable by the control panel. The first display shows a current date. The second display shows a future date. The locking system opens the openable upper end once the future date and the current date correlate.

Abstract: The settling rate of caustic alkali-digested goethite-containing bauxite or laterite, or the like, is increased by carrying out the digestion in the presence of a reducing agent capable of reducing the trivalent iron component of the goethite to a lower valence so as to convert the goethite to hematite, magnetite, metallic iron, or combinations thereof, which enhance the settling rate of the digestion mass.