Those objects that are common on solitary altars are derived from the various objects that are used in the wiccan group rituals. Those ritual objects include a sword (also called a 'magic sword'), a black-handled knife (called an athame), a bowl containing water, a bowl containing salt, an asperger (an object that sprinkles water), candles, a bell, a white-handled knife (which is now usually called a 'bolline', due to being confused with a different object), a wand, a cup (also called a chalice), a pentacle, a censer (a container that burns incense), a scourge (a short whip with several whipping cords), and binding cords. Gerald Gardner, a founder of modern Wicca, started the practice of calling such objects by the misnomer 'tools' or 'working tools', because he was imitating Freemasonry, which used actual tools, such as a trowel.