The things you learn while paging though an encyclopedia looking for great images to share. This my friends is a bath chair. In my mind a bath chair is something you put in the shower when you have trouble standing. But, apparently James Heath, thought it would be the perfect name for his rickshaw-like conveyance that he invented around 1750. After all, he lived in Bath, England. Bath was a tourist destination and perhaps he designed the bath chair to help those visitors who were elderly or disabled.
This bath chair drawing shows a model with 3 wheels. It has a folding hood and a glass front (I guess that folded down too). It could be configured to be drawn by a donkey or small pony.
This image is copyright free and in the public domain anywhere that extends copyrights 70 years after death or at least 120 years after publication when the original illustrator is unknown.