A metal, hand-crank centrifuge with a three-pronged metal base. The base is painted a rusty red color and has been attached to a wooden board for stability. A long metal crank on the side of the base bends at a 90-degree angle and ends in a wooden handle. Four arms extend from the column of the apparatus, each ending in a tube mount. The four arms spin when the crank is turned. Four bronze sample containers fit into the centrifuge arms. Glass test bottles may be inserted into these metal holders for experimentation.

This is an example of an apparatus that may have been used for a Babcock test. The Babcock test, developed by agricultural chemist Stephen M. Babcock (1843–1931), is an inexpensive and practical procedure to determine and separate the fat content of milk.