A test apparatus, as used for the article “Modification of Force Feed Lubricators” in the 1960-05 edition of Lubrication Engineering. The idea was to study why the same oils in the same engines in similar locations had to be replaced at different rates. So they lined up a bunch of reservoirs attached to a single drive shaft – the same rpm for every batch of oil in every reservoir – in order to test temperature and pressure differences in a more accurate way. They also wanted, in the experimenters’ own words, “to develop lubrication consciousness.”
They also report their program far exceeded expectations.
I found this on archive.org.