Notes titled Electronic Water Purification. Includes the price of four different size units. Mentions how the unit can be set up and how it can be operated. Also mentioned is the new development in water purification. Signed Stuart Brumley Corporation.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, electronic water purification

Invented by a member of the Abbott family of Bendigo, scalebuoys came in various sizes and had a variety of uses such as the mining industry to prevent scale build up in boilers, automotive for car radiators and domestic for water purification. Its essential part is a sealed glass bulb containing a small amount of mercury and a combination of gases.This particular variety was made to be connected to a water tap with a screw attachment and a small outlet pipe. Scalebuoy sent to Alan Cowling from work colleague, Pat Curran in Tasmania. Pat Curran was working as the CEO of a retirement village and found the scalebuoys in the equipment there. Noting the Bendigo manufacturing logo, he decided to send it to Alan. The original owner of the scalebuoys is unknown.sciences, instruments - general, scalebuoy