Black and white photo by Vincent Kelly. Typed on the back: Four Buoy house unit. Dish in picture is an old iron dish which has been used for fowls to drink out of. The photo speaks for it self. After a few weeks treatment by pouring in a dipper full of Scalebuoy Water daily the results of the process can be seen. Note the patches where the scale formations have been removed. The photographer's name - Vincent Kelly Bendigo is imprinted in the bottom left corner.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, four buoy house unit, vincent kelly