Agricola, Georgius, De re metallica, 1912/1950

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1by a workman out of tunnels or sheds. It is made as follows: two planks
are
chosen about five feet long, one foot wide, and two digits thick; of
each
of these the lower side is cut away at the front for a length of one
foot
, and at the back for a length of two feet, while the middle is left whole.
Then in the front parts are bored circular holes, in order that the ends of an
axle
may revolve in them.
The intermediate parts of the planks are
perforated
twice near the bottom, so as to receive the heads of two little
cleats
on which the planks are fixed; and they are also perforated in the
middle
, so as to receive the heads of two end-boards, while keys fixed in
these
projecting heads strengthen the whole structure.
The handles are
made
out of the extreme ends of the long planks, and they turn downward
at
the ends that they may be grasped more firmly in the hands.
The small
wheel
, of which there is only one, neither has a nave nor does it revolve
around
the axle, but turns around with it.
From the felloe, which the
Greeks
called ἀψῑδες, two transverse spokes fixed into it pass through the
middle
of the axle toward the opposite felloe; the axle is square, with
the
exception of the ends, each of which is rounded so as to turn in the
opening
.
A workman draws out this barrow full of earth and rock and draws
it
back empty.
Miners also have another wheelbarrow, larger than this
one
, which they use when they wash earth mixed with tin-stone on to which
a
stream has been turned.
The front end-board of this one is deeper, in
order
that the earth which has been thrown into it may not fall out.
82[Figure 82]
A—SMALL WHEELBARROW. B—LONG PLANKS THEREOF. C—END-BOARDS. D—SMALL
WHEEL
. E—LARGER BARROW. F—FRONT END-BOARD THEREOF.

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