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)
PARAGRAPHUS II Crocus Martis vel chalybis aperiens . … pars sulphurea comburitur , remanente materia quadam nigri coloris . Si magno igne urgeatur , & per spatium bihorii circumagitetur , sanguineum colorem recipit , refrigescat dein & conservetur . Si crocus hic ad quanti tatem 2 s vel 30 librarum simul praeparetur , mixtura solet calefieri & per se…
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