Black and white photo of a 10 Buoy Unit installed at O'Halloran's Cyanide Plant at Eaglehawk. Photo shows two views, one from the side and one from the top of the unit. Information typed on the back of the photo.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, scalebuoy, o'halloran's cyanide plant eaglehawk, vincent kelly

Black and white photograph of a Scalebuoy Unit attached to the side of a house. Unit is long cylinder with two pipes coming out of it and joined at the top. There are three gate valves on the unit. Some plants beside the unit.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, scalebuoy

Two photographs of a Scalebuoy Unit. The Scalebuoy Unit is sitting on a stool in front of a large leaf plant. It looks like a motor driven Unit.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence

Piece of paper with a sketch of a Scalebuoy Unit used in conjunction with water treatment & Plant attached to a wood fired Boiler at the Pyramid Hill Butter Factory. Sketch shows the Scalebuoy Unit. Note at the bottom mentions that he did not see the unit as it was intended for use. The unit had been broken up when he first saw it. Would have been about thirty mercury flasks, each of which was covered in an easily removable film of salt deposit. Interest was sparked after cleaning one of the flasks and seeing the engraving. He regretted not taking the whole of the unit. On the back is written the name - Frank Honeychurch-8 Harley St, Bendigo 1/3/02.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, pyramid hill scale buoy butter factory, frank honeychurch