Three butyrometers and a collection of stoppers. One of the butyrometers features graduations on shaft marked 0% to 10%. "MILK/1094ml/NATIONAL/B.S.696" is written on the bulb. There is a black glass stopper in the top and a clear glass ball loose inside and a white spot at one end. Another butyrometer features graduations on the shaft from 0%-10% and has a stopper in the top and a white spot near one end. The third butyrometer has the same graduations etched in red. "MILK/1094/ml/NATIONAL/B.S. 696" is written in red on the bulb and a white spot is near one end. "BRITISH MADE" is engraved in the top of the stopper that is stuck in the top. The tops of two similar stoppers are also included.
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