If a muktzah item is placed on something else, the item holding the muktzah becomes muktzah itself. For example, the tray that Shabbos candles are placed upon is Muktzah for all of Shabbos. This is so even if the candles are removed from upon the tray. This principle is knows as basis which means a base. We will be discussing a number of applications and qualifications to this principle in the days to come.