Black and white photo of two men outside a building with two piles of scale and a Scalebuoy Unit. One man standing beside the door is wearing a suit and the other man, sitting on a box, is wearing overalls and he is holding a six buoy unit. One pile of scale is pale and the other is black. Written in the photo is Shrensbury Dairy Co (N.J). Beside the black pile of scale is: Scale removed July 12-1933 and beside the pale heap is: Scale removed May 10-1933. At the bottom is: Electronic Buoys Installed Feb. 26-1933. Photo is pasted on an album page. On the back is another sepia photo of a very large scalebuoy unit which is resting on the ground. Behind it a large tank resting on two large concrete blocks.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, shrensbury dairy co (n.j)