Not sure how much help I'll be, but here goes...
1567 - This is a strange one. The forked end looks as though it's made
for pushing, rather than turning like a wrench or holding like tongs.
Maybe it's to guide the necks of bottles as they get filled by a machine
or to position small crucibles or similar in an oven?
(If there were a hole through the fork, I'd say it's a stubby handle for
something like a wagon or pullcart, but there's no hole there.)
1568 - The uninteresting portion of the rod looks to me as though it may
fit a standard laboratory stand clamp, so I'm guessing this is to hold
some sort of glassware over a burner. Presumably, it would be a
medium-sized or large-sized beaker or flask of some sort, given the
overall size. The one thumbnut allows the flask to be held at various
angles, while the other adjusts the size/pressure of the jaws. The
spring seems a tiny bit superfluous, but probably eases things to not
have to hold the jaws open when operating the clamp.
1569 - Other than a slightly oddly shaped glass bottle, I'm not seeing
too much here. Was the odd shape perhaps to allow it to fit unseen in
the framework of an automobile or something, say to get liquor around
1570 - Not sure what precisely this would be used for, but it appears to
either heat something over a fire or draw samples of a fluid from a drum
1571 - It would appear that a shaft would go under the instep,
suggesting these may have been used as a treadle or pedal for some
machine or vehicle. Being able to strap in would be helpful for, say, a
foot throttle of a speedboat.
1572 - I think I actually know this one; it's a tool for pounding metal
signposts or fenceposts into the ground. The open end goes over the top
part of the post, and the tool is slid up a bit and yanked down to whack
the post down. Often (OK, at least occasionally) seen in the hands of
highway department workmen.
Now to read other guesses.
"He is no fool who gives what he cannot keep to gain that which he cannot
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