Abstract: Apparatus for providing motive power comprises first and second communicating columns (10, 14) of liquid, the liquid in the second column being substantially the same as in the first column but containing a finely divided material to increase its specific gravity relative to the liquid in the first column, means (28) for maintaining the finely divided material in suspension in the second column, whereby liquid height in the respective columns is different, so that liquid from the first column overflows into the second column, means for converting energy from resultant movement of liquid into motive power and means (26) for returning the liquid to the first column.

Abstract: A user interface for a graphical application tool is disclosed. A graphical application tool is a software program, such as a computer-aided design (CAD) tool, a spreadsheet package, or a graphics drawing package, that graphically provides a user with a set of commands, tools and icons, which a user can graphically manipulate to generate, modify or analyze a work product in a work space area. The graphical application tool includes a graphical user interface (GUI) to provide users with a repositionable menu of available commands, tools and icons. The menu provides access to the commands, tools and device offerings without interfering with the user's work space area. In the illustrative computer-aided design (CAD) tool embodiment, the menu preferably provides a user with access to core and custom commands and circuit component offerings.