Receipts for preparing and compounding the principal medicines made use of by the late Mr Ward. Together with an introduction, etc / [John Page].

  • Page, John, 1699?-1779
Date:
1763
Catalogue details

Licence: Public Domain Mark

Credit: Receipts for preparing and compounding the principal medicines made use of by the late Mr Ward. Together with an introduction, etc / [John Page]. Source: Wellcome Collection.

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    and run into Lumps, in the Beginning of your Ope¬ ration, you muft take it out of your Pan, and pound it again ; putting it in again, and flirring as before, till it be thoroughly calcined. Then put in four Ounces more of your crude Matter ; proceeding as before, and continuing fo to do, till you have as much as you defire. By this Method you will cal¬ cine your Antimony with much lefs Labour and Time, than in doing it all together, as is ufual: For, by putting your crude Antimony to your cal¬ cined, its melting will be prevented, and the Fumes will fly off much fooner. 'N. B. It muft be done in a Chimney ; other- wile the Fumes will be hurtful to the Operator.] Take a clean Crucible, which will hold about a Quart; put into it about two Pounds of your cal¬ cined Antimony ; fet it in a melting Furnace, and make a gradual Fire under it *, put Coals nearly to the Top of your Crucible; keep it in a moderate Fufion, fometitnes flirring it about with an Iron Rod: Care muft be taken that your Fire be Tot too violent, while your Matter is in Fufion ; or it will liquify it to fuch a Degree^ and render it fo fubtle, that it will all run through the Pores of your Crucible, into your Afh-hole •, not leaving one fingle Drop, or Grain behind. When you And your Matter, which adheres to your Rod, tranfparent and bright (which it will be, in about half an Hour after it is in Fufion, if you have kept a proper Degree of Fire) have, in readi- nefs, a fmooth Marble Stone, well dried, and heated as hot as you can bear your Hand upon it *, for fear your hot Matter fhould break it. (It will be pro¬ per to have an Iron Curb round your Marble, to rife half or three Quarters of an Inch above its Sur¬ face, to prevent your Matter from running off.] Pour your vitrified Matter upon your Stone * and if you have any more of your calcined Matter, put your