though it is just as common to shorten the term to "bed" in that usage (e.g. The hospital has 250 beds...). An infant bed (also "crib" or "cot") is a small bed specifically for babies and infants. An iron bed, developed in the 1850s, is constructed of iron and steel. A kang bed-stove is a Chinese ceramic room heater used as the platform for a bed. A Charpai is a traditional Punjabi bed made of tied ropes bordered by a wooden frame. A mourning bed ("illustration") is a formal canopied bed, with the deceased, a wax effigy, or symbols of rank. A Murphy bed or wallbed is a bed that can fold up into a wall or cabinet to save space. An Ottoman bed (in the UK) is a type of storage bed in which the storage area is placed underneath the mattress base and accessed by lifting the hinged mattress frame with the help of a spring or hydraulic mechanism. A pallet is a thin, lightweight mattress. A platform bed is a mattress resting on a solid, flat raised surface, either free-standing or part of the structure of the room. A roll-away bed is a bed whose frame folds in half and rolls in order to be more easily stored and moved. This is used in different settings, including hotels for either free or a nominal fee per night, where more people than expected may need to sleep in the same room, e.g. 5 people in a hotel room for 4 (two twin beds). A rope bed has a wooden frame within which crossing ropes, which may support a straw- or down-filled single mattress. See charpai. A slat bed is a flatpack bed with wooden slats for the bedbase. A sofabed ("pull-out" or "pull-out bed") is a folding bed that is stored inside a sofa. Sofa beds are also called "convertibles" and "hideaways." A state bed developed in Early Modern Europe from a hieratic canopy of state. A toddler bed is a small bed for young children. A trundle bed or "truckle bed" is a bed usually stored beneath another bed during the day. They have been in use for centuries. In the modern era they are sometimes referred to as a "sleepover bed" or "daybed with pop up trundle." A vibrating bed (also known as a Magic Fingers bed) is typically a coin-operated novelty found in a vintage