Boodt, Anselmus de, 1550-1632, Tollius, Adrianus, 17th cent · Lugduni Batavorum, : Ex officina Joannis Maire. · leaf 95
ro pulvis a gemmx duritie in tenuilfimum pollinem redadtus (ante enimgrof- fo modo tantum contulixs fuit) nulla amplius alpe- ritatem, ut in gemmam agere poflit, habere ani- madvertitur: novus , vel recens fubftituitur ; Ita paulatim gemmx durities fuperatur , ac ligni inftar i lecatur. Aqua… … Ad lapides perforandos aliud inftrumentum commodiilimum eft. Fiat frudum chalibis unius pedis longitudine , rotundum pro amplitudine fo- raminis. Deinde in extremitate , feu plana ipfius
Minerals · Precious stones
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