0 1 2 3 Mon 18 Dec 1876 Mon 01 Jan 1877 Thu 01 Feb 1877 Thu 01 Mar 1877 Sun 18 Mar 1877 Hours Slept Hours Slept Rolling Average Total Time in Bed Total Rolling Average <- Previous Period Next Period -> Date Range: to Offset: hours Data: Hours Slept Hours Laying Awake Total Time in Bed Total Dreams Show: Raw Data Rolling Average Rolling Average: Start from Zero Events: None Major All