The method and plain process for making pot-ash : equal, if not superior to the best foreign pot-ash published, in consequence of the late encouragement granted by Parliament for that purpose / By Thomas Stephens.

  • Stephens, Thomas, -1780
Date:
[1755?]
Catalogue details

Licence: Public Domain Mark

Credit: The method and plain process for making pot-ash : equal, if not superior to the best foreign pot-ash published, in consequence of the late encouragement granted by Parliament for that purpose / By Thomas Stephens. Source: Wellcome Collection.

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    F A Ciftern For keeping the Lye in. t G A Hand Pump for throwing the Lye out of the Receivers Into the Stee- pers, Fig. 2. Reprefents a Sedtion of the Furnace of Calcination and Fufion, with the Caldron for Evaporation. A The Veffel over the Furnace, in which the Lye and Afhes are mixed. B A Hole within a few Inches of the Back of the Furnace, with an Iron Soc¬ ket, to let the Pipe through the hinder Part of the Arch, to reach down within two Inches of the Floor. C The Caldron for boiling the Lye to a Drynefs, for making Pearl-Alh, muft be caft from the belt Iron Ore, about 8 Inches deep and about 3 Feet fix Inches Diameter; the Rim 4 growing to a full Inch thick at Bottom. D The Veffel, from whence the Liquor runs as fall into the Caldron as it eva¬ porates. Fig. 3. Shews a front Elevation of the Furnace and Caldron. A The Iron Door to the Floor of the Furnace about 20 X 12. BBB The Doors to the Fire Places 16 X 14. CCC Afh-EIoles 2 Feet deep. D A Regifter or Iron Plate in each Funnel of the Furnace, for governing the Fire, and made to Aide in a Frame. Fig. 4. Reprefents a Plan of the Furnace and Caldron, A The Ground 12x15 Feet. B B The two fide Walls three Feet thick and more, and four Feet high. CCCC The Front and back Walls two Feet thick. DD Quadrangular Iron Bars, laid Angle-ways fix Inches lower than the Floor, and ~ Inch dillance from each other, which form a Grate 18 Inches wide. E The Floor of the Furnace 10 Feet long, 44 Feet wide, and 14 Inches below the Crown of the Arch j with an Inch defcent from Back to Front. F Courfe of Bricks on each Side of the Floor, to raife an 8 Inch Wall two Inches high, to fave the Mafs in Ftifion from falling into the Fire Places. G G G G Four Flues 5x4 which lead to the Funnels. H H The Funnels 12 X 8. I Iron Bars which form a Grate 2 4 Feet fquare. G G G Three Flues ? , n n FI Funnel s t0 t^ie ^aHron. Note, the Mortar for building the Furnace muft be made of Loam, the Arch 18 Inches thick, and the Floor laid with Tiles upon a Layer of Sand, at leaft an Inch thick, with very neat Joints: And the Door had better be unhung, and the Way bricked up, leaving only a Hole about 4 Inches fquare or lefs, to fee how it works, when you make Pot-Afh. FINIS.
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