Two copies of a typed letter, printed on paper with a printed letterhead, dated 17 September, 1937. Letter is from the Secretary of Knox Home to the Managing Director, Scalebuoys (New Zealand) Ltd. He mentions he has enclosed a cheque for payment of the Scalebuoy equipment and they were quite satisfied with it.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, n a duthie, national mutual life chambers auckland, knox home, scalebuoys (new zealand) ltd

Three typed copies of a letter dated 29 June, 1938. Letter is to Scalebuoys (New Zealand) Ltd. From the Manager of The Whangarei Co-op Dairy Company Ltd. Mentioning the improvement in the condition of the two boilers since using the Scalebuoy. Also mentioned that using the treated water gave a better result for washing the five churns than the untreated water.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, whangarei co-operative dairy company, ltd, scalebuoys (new zealand) ltd, babcock

Printed brochure titled ' A Scientific Treatise on Scalebuoy Process of Water Treatment. Top of front page has a green bulb at the top with the title underneath. Brochure gives the history of the Scalebuoy, the fundamental principles, use and a summary of the Scalebuoy method of water treatment. Written by R. H. S. Abbott.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, a scientific treatise on scalebuoy process of water treatment, scalebuoys (new zealand) ltd, r h s abbott, herald printing works auckland

Black and white photograph of a large Scalebuoy Unit and other various parts and units arranged on the floor in front of the large unit. Photo pasted onto an album page and some newspaper cuttings from The East Anglian Daily Times dated Wednesday, April 7, 1937 on the back. Cuttings mention the Funeral of Capt. J. Brooks Close, Auckland Registrations of New Private Companies including Electronic Company of New Zealand, Ltd, Scalebuoys (New Zealand) Ltd and some travel arrangements of Richard H. S. Abbott.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, scalebuoy, east anglian daily times 7/4/1937, r h s abbott, capt james brooks close, electronic company of new zealand ltd, scalebuoys (new zealand) limited

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

Eleven page article titled Water Softening in the Boiler by the 'Alfloc' System. This is an internal method of conditioning boiler feed water and the use of coagulants designed to prevent scale formation in the boiler and accessory plant, to reduce corrosion to a minimum, and further to provide for those conditions in the boiler water which from present experience are believed to prevent the occurrence of caustic ombrittlement. Different chemicals were used to suit different types of water in different areas. Items discussed are: Summary, Introduction, External treatment, Internal Treatment, General Principles of the 'Alfloc' Internal Treatment, Precipitation of the Scale-forming Salts, Temporary Hardness, Permanent Hardness, Conditioning of the Precipitate - Floc Formation, Efficient Control of the Concentration of both Dissolved and Suspended Solids by Blowdown, Prevention of Corrosion, Testing and Control, The 'Alfloc' Reagents for Internal Treatment, 'Alfloc' Liquors, 'Alfloc' Briquettes, Alfloc' Powders, Methods of Application, Liquors - Stationary boilers and Locomotive boilers, Briquettes - Stationary boilers and Locomotive boilers, Powders, Blowdown, Sludge, Caustic Embrittlement, Control of 'Alfloc' System, Cost and Economies of 'Alfloc' Internal Treatment and 'Alfloc' Water Treatment Service. Listed on page 11 are ICIANZ Sales Offices the Australian States. Between pages 7 and 8 is a page of diagrams. They are: Showing method of feeding liquors to the feed tank of boilers for 'Alfloc' internal treatment, typical arrangement of pressure vessel and typical arrangement of 'Alfloc' by-pass feeder.sciences, instruments - general, scalebuoy, bill ashman collection, alfloc system, imperial chemical industries limited alkali division, alfloc liquors, alfloc briquettes, alfloc powders, imperial chemical industries of australia and new zealand limited, elder smith & co limited, chemical & textile agencies pty ltd