A Sand Bath is one of the oldest known pieces of laboratory equipment. It was used in Latin and Arabic alchemy. A Sand Bath consists of a container filled with heated sand. Nowadays, a hot plate is also used as a base and a steel container is filled with sand and fitted on top. A …

Water that has been standing in a storage tank can become very dirty and unsafe for use. You need to try and prevent the harmful growth of bacteria, mould and algae because these micro-organisms can cause disease in plants, unsafe drinking water and a difficult-to-clean water tank. Using a UV light is a simple and …