Black and white photo of a barrel shaped Scalebuoy Unit which is driven by a small electric motor. Large pipes enter and exit the barrel. Written on the back: Installation at Mater Misericordiae Hospital Auckland, N.Z.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, chelsea studio auckland, mater misericordiae hospital auckland

Typed carbon copies of two letters stapled together. The first letter is from W. H. Noe to R. H. A. Abbott and dated 25 July, 1938 discussing Scalebuoys and who was using them. The second letter is from W. H. McCorkingdale to Mr. Hough, Works Manager, Lever Bros. (N.Z.) Ltd., dated 25 July, 1938. Letter mentions the use of Scalebuoys, application, companies using them, and he asks if considering Scalebuoys at the works to send him some information.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, scalebuoys new zealand limited, r h a abbott, scott's hotel melbourne, hardley's works, lever bros of australia, mr hough, w h noe, hawke's bay farmers' freezing company, mater misericordiae hospital auckland, st joseph's, whangarei dairy company, maungatapere dairy company, n z railways, the union oil soap & candle company, knox's home, moody's dye works, ellis & burnand (sawmillers), walter buchanan ltd, findlay's gold krust bakeries, kaiticke dairy company, pennsylvania rubber company, page-hersey tube company, w h mccorkingdale

Three copies of a Letter, dated November 5, 1936, from Sister M. Monica to Sister Mary Gonzaga, relating to her the benefits of using scalebuoys in the water to the boilers and hot water systems. It had removed scale from the pipes. The only problem they had was the scale that had fallen off blocking the traps and that soon stopped. Scalebuoys were going to be installed in the cold water system as soon as there was more money to do it.Letterhead -St Josephs Hospital Phoenix Arizonasciences, instruments - general, scalebuoy, bill ashman collection - correspondence, st joseph's hospital arizona, sister mary gonzaga, mater misericordiae hospital auckland, mr herzog, st mary's hospital san francisco, mr abbott, sister mary monica