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Ore-Washing Sieve: Tub Staves, Iron Hoops and a Clipped Iron-Wire Bottom (Agricola, 1556)
Georgius Agricola (tr. H. C. and L. H. Hoover) · Public domain
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Ore-Washing Sieve: Tub Staves, Iron Hoops and a Clipped Iron-Wire Bottom (Agricola, 1556)

The large ore-washing sieve of a 16th-century mine, from Agricola's De Re Metallica, Book VIII (1556): about a cubit across and half a foot deep, built like a little tub of staves bound with iron hoops, with a bottom of crossed iron wires clipped at every crossing, an iron band and two iron cross-rods, and a handle each side for shaking it in a tub of water.
Hagati
About 2 days

Amabwiriza

1

Size in metric

Gupakira ikaye ya Jupyter…
2

Read De Re Metallica, Book VIII

"The sieve is generally a cubit broad and half a foot deep."
3

Make the wire bottom

Lay straight and cross iron wires so the holes stop the larger broken rock, and bind every crossing with a small iron clip. Fix it in an iron band braced by two iron cross-rods.

Ibikoresho by'iyi ntambwe:

Urusinga rw'icyumaUrusinga rw'icyuma1 igice
Umurongo ugororotse w'icyuma cyoroshyeUmurongo ugororotse w'icyuma cyoroshye1 igice
Umurongo uziguye w'icyuma cyorohejeUmurongo uziguye w'icyuma cyoroheje2 ibice

Ibikoresho bikenewe:

Uruganda rw'umucuziUruganda rw'umucuzi
IngoyiIngoyi
InyundoInyundo
Ipfundo Rifite Umunwa UringaniyeIpfundo Rifite Umunwa Uringaniye
Umucumita w'IbyumaUmucumita w'Ibyuma
4

Make the tub body

Make the rest of the sieve of staves in the shape of a little tub, a cubit broad and half a foot deep, closed round the wire bottom. Bind it with two iron hoops, or with three hoops of hazel or oak. Fit a handle on each side.

Ibikoresho by'iyi ntambwe:

Ikibaho cy'igiti cy'umwaloni w'umweruIkibaho cy'igiti cy'umwaloni w'umweru2 ibice
Uruziga rw'icyumaUruziga rw'icyuma2 ibice

Ibikoresho bikenewe:

Umucumita w'IntokiUmucumita w'Intoki
Ikoresho cyo gusiga ibitiIkoresho cyo gusiga ibiti
Ibyuma byo kubazaIbyuma byo kubaza
InyundoInyundo
5

Wash ore

Set it in a tub nearly full of water. Throw in the earth, sand and broken rock with a shovel; shake the sieve up and down, turning it alternately to right and left, so the smaller material passes through. The larger pieces left in it go to the stamps.

Ibikoresho bikenewe:

Indobo y'ibitiIndobo y'ibiti
Indobo ya Litiro 20Indobo ya Litiro 20
6

Troubleshooting

Sieve troubleshooting.

Flow

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7

History and honest limits

From Georgius Agricola, **De Re Metallica** (1556), Book VIII, translated by Herbert C. and Lou H. Hoover, 1912 (checked on the archive.org scan georgiusagricola00agri, p. 292). He gives no wire spacing; the metric figures and the tools are ours.

Ibikoresho

5

Ibikoresho bikenewe

10

Iki gishushanyo gikora

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Akayungurizo

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Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame

Mine Suction Pump of Bored Logs: Perforated Trunk, Valve Box and Leather-Shoe Piston (Agricola, 1556)

Mine Suction Pump of Bored Logs: Perforated Trunk, Valve Box and Leather-Shoe Piston (Agricola, 1556)

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