Black and white photograph of a pile of scale from the Cohuna Butter Factory Boiler. Photograph shows the pile of scale on a bench with a brick wall and a wood stack behind it. Written on the back: Scale from Cohuna Butter Factory Boiler. Note 200/cc Scalebuoy is 3'' in Dia & 4'' Long for size Comparison?sciences, bill ashman collection - correspondence, photograph, scale from cohuna butter factory

Black & White photograph showing scale taken from Cohuna Butter Factory boiler after Scalebuoys installed.Description hand written in ink on back.photograph, person, male

Black and white photograph showing scale taken from Cohuna Butter Factory boiler after Scalebuoy treatment, description hand written in ink on back.photograph

Two black and white photographs of scale from the Cohuna Butter Factory Boiler. Photos show a pile of scale on a bench with a brick wall behind it. Written on the back of one is: Cohuna Butter Factory Boiler Scale.sciences, bill ashman collection - correspondence, photograph, cohuna butter factory

Black and white photograph showing a man standing beside a bench piled with scale. The bench is held up by a couple of boxes. He is holding some pieces of scale. Written on the back is : Scale Removal from Cohuna Butter Factory Boiler 1942. 24 buoy Machine. Most of this scale was from the tubes. Much more had been taken out at previous openings.sciences, bill ashman collection - correspondence, photograph, cohuna butter factory boiler

Copy of a letter, dated 12/12/41, to Mr. Bacon of the Mines Department, Treasury Gardens, Melbourne from G. Whalley. Letter mentions a boiler at Cohuna which had a scale problem. After the installation of Scalebuoys the scale fell off the interior of the boiler in a short time.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, bendigo electronic company of australia pty ltd, amalgamated freezing coy, mr bacon, mines department melbourne, gunbower butter factory, cherrokee, mr f stevenson, g whalley