The Temple Institute: In-Depth Temple Study: The Place of the Hearth The Four Chambers: The Immersion Chamber
 
The Place of the Hearth: The Four Chambers: The Immersion Chamber: Dimensions

The priests descended a spiral staircase called the mesiba to the Immersion Chamber. This staircase was illuminated by candles held in nooks in the walls on both sides. (Sources: Tamid 1:1). 

Contents:   Part I,    Part II,    Part III,    Part IV,    Part V,    Part VI,    Part VII