546) reporting on a new design of furnace in Cornwall for melting tin followed by Latin notes on the flow of water from a hole in a cylinder

Author: Isaac Newton

Source: MINT 19/5/29, National Archives, Kew, Richmond, Surrey, UK

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- Revision History
  - 1 January 2001
    - Catalogue information compiled by Rob Iliffe, Peter Spargo & John Young
  - 29 September 2011
    - Catalogue exported to teiHeader by Michael Hawkins
  - 17 February 2020
    - Transcribed by Robert Ralley.
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<29r>

That since our late Report Assays have been made in the Tower of Parcels of Tin cut off from blocks in Cornwall by her Majesties Ass^{r} of East country Tin melted in the furnaces & in the blowing houses & both sorts found of like goodness without any manifest difference

That Assays have been made also of pieces cut of from blocks by the Agent of the Patentees & the Tin proved of like goodnes with the former.

That none of these Assay pieces proved grain Tin they being East country Tin where very little grain Tin is produced.

That some represent above one tenth of all the Tin in Cornwal has heretofore been grain Tin & others that not above a 20^th part And that the Agents in Cornwall be directed to give the best account they can of what number of bocks of grain in have been made by the Patentees in the th last coynages in proportion to the other sorts of Tin.

That some represent that the staying of Tin in fusion in the furnaces longer then in the blowing houses consumes the best parts of the Tin, others that it consumes the drossy parts & refines the Tin. And for the dicision of this point We humbly desire that a triall may be made in Cornwal before the Queens Ass^r & the Agents or whom they think fitt to roder, whether the Melting houses or the blowing houses by their usual ways of working do out of the same parcel of washt Oar called black Tin produce the best Tin & whether Tin by being kept some hours in the heat of the furnaces grow better or worse then at first & a report thereof be made to his Lordship. For such trials can be only made upon the place

Sit IO media proportionalis inter IH et IG et

Aqua per foramen EF egrediens, quo tempore gutta cadendo ab I describere posset altitunem IG æqualis est cylindro cujus basis est EF Et altitudo 2IG id est Cylindro cujus basis est circulus CD et altitudo 2IO, et quo tempore gutta cadendo describere posset altitudinem IH, aqua egrediens æqualis est cylindro cujus basis et AB et altitudo 2IH, Et quo tempore gutta cadendo ab I per H ad G describit altitudinum differentiam HG aqua egrediens id est aqua tota in solido ABNFEM æqualis est differentiæ cylindrorum id est cylindro cujus basis est CD et altitudo 2HO. Et propterea aqua tota in vase ABDC est ad aquam totam in solido ABNFEM ut HG ad 2HO. id est ut $HO + \frac{IO \times HO}{IH}$ ad 2HO seu IH+IO ad 2IH atque adeo ut summa circulorum EF et AB ad duplum circulum E F. Et in eadem etiam ratione sunt aquarum pondera, utpote aquis ipsis proportionalia.

<29v>

We humbly beg leave to represent to your Lordship that Daniel Stuart the Collector of the Bullion for the Mint at Edinburgh is dead (as we hear by the last Post) & that in our humble opinion the place of Collector of the Bullion being irregular & useless should cease & the said Bullion be hence forth paid by the under Collectors into the hands of the Cashkeeper of North Br{illeg} Britain & kept apart in the Exchequer in a proper Chest under the key of the said Cashkeeper & also, if it be thought fit, under the key of the General of her Majesties said Mint, (as is directed by the Scotch Act of Parliament for granting this Duty to the Mint) & that it be issued out thence from time to time by Warrants to the General & Master of the said Mint & kept apart in the Treasury of the said Mint under the keys of the General the Master & the Wardens for defraying the charges of coynage & repairs & paying of Salaries & be accounted for annually by the Master [according to the rules set down in the Indenture of her Majesties Mints] so that the two Mints may be under all the same Rules, in conformity to the Act of Vnion. And we are further of Opinion that the Executor of Executors of the said M^r Stuart be directed forthwith to pay into the hands of the General Master of that Mint such a summ of money as your Lordship shall think fit, suppose the summ of 200 or 2500 pounds, to be kept in the Treasury of that Mint under the keys of the General the Master & Wardens, that the service of that Mint receive no stop for want of moneys, there being as we are very credibly informed, a far greater summ in the hands of the Executor of said M^r Stuart

All which &c.