Emanuelis Swedenborgii ... Regnum subterraneum sive minerale de ferro : de que modis liquationum ferri per Europam passim in usum receptis : de que conversione ferri crudi in chalybem : de vena ferri et probatione eius : pariter de chymicis praeparatis et cum ferro et victriolo eius factis experimentis &c. &c (1734)
3 ° J PARAGRAPHUS III . Crocus ferri vel chalybis a dß fingens . … obtinetur . Koenig . II . Paratur commodissime crocus adflringens solo igne reverberii , si bacilli chalybei furno ita apte imponantur , ut illos flamma undique possit lambere ; tunc enim continuata per aliquot dies calcinatione , crocus levi - ufculus & pulcherrimus in superficie apparebit ,…
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