During construction - the composting toilet. A Joe Jenkins (The Humanure Handbook) style toilet - just a bucket, with a bin full of cover material (sawdust) built in. The wooden slab that forms the seat is lime.
Earth Closet, 1860s "Born in 1801, the Rev. Henry Moule patented an earth closet toilet system in 1860. His motives were to save his poor Victorian parishioners from cholera by devising a sanitary but simple set-up, suitable for homes where indoor piped water was an impossible dream. Today his design, now re-named a composting toilet, could save us from water shortages and expensive plumbing, while enriching our vegetable gardens. The big drawback is that someone has to haul earth around..."
This composting toilet block with disabled access was commissioned by a farm near Glastonbury that works with children and adults with learning difficulties, where it was vital to install toilet facilities providing equal access to all.