"DoN. Nichols" wrote:
....
429) I presume that there are also partitions between the cavities
exposed by twisting the head.

I think that this is for sampling something, grain perhaps, at
various depths in a pile. You close the ports, shove it it,
rotate it to open and allow in samples, rotate it again to
close, and withdraw.

There is probably a setup with equally-spaced containers to
receive all samples at the same time, prior to examination by
whatever means -- microscope, bare eyes, moisture tester,
whatever.

You got's it...grain sampler (or other dry material also possible). W/
grain samples anyway, the sub-samples are mixed before weight/moisture
testing.