Friday, September 3, 2010

Babcock Milk Tester



Though a little shaky, the above video provides a good idea of a hand-worked Babcock Milk Tester in motion. The tester is in the collection of the Bega Pioneers Museum, who have kindly allowed me to present this material.

As per the last post, the centrifugal machine was worked by the user rapidly rotating the hand crank for about half a minute. This machine could fit two samples at any one time.
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2 comments:

  1. LindaSeptember 3, 2010 at 1:39 PM

    Ummmm - now this really has got me confused. The identical one at Stratford spins quite well, and when it gets going, the openings face inwards. The idea of centrifugal force is that it throws things outwards. If you spun this one this way, it would throw the contents out.

    http://stratfordhs.blogspot.com/2010/08/show-me-your-centrifuge.html

    Except I have now seen illustrations of the bottles that go in these, with long thin necks with measurements on them. And I could not work out how they worked. If the machine was set up like this one you show, while it might throw the solids into the neck, it would throw the bottles out first.

    So maybe they spin the way the Stratford one is, with the centrifugal force separating out the solids, which then float to the top of the neck, and are measured???

    While the thinness of the neck leads to more accurate measurement there, the other thought is that might be where the less voluminous acid is added. Any thoughts to help me????

    There is a good photograph, with bottles, at
    http://dairyantiques.com/Other_Dairy_Antiques.html

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