Oughtred, William

1575 – 1660

• Key of the mathematicks
• The key of the mathematicks new forged and filed
• Guilelmi Oughtred ... Opuscula mathematica hactenus inedita
• An addition unto the use of the instrument called the Circles of proportion, for the working of nauticall questions
• An addition vnto the vse of the instrument called the circles of proportion, for the working of nauticall questions
• Arithmeticae in nvmeris et speciebvs institvtio
• Clavis mathematica denuò limata
• Clavis mathematica denuò limata, sive potius fabricata
• Clavis mathematicae denuo limata, sive potius fabricata
• Clavis mathematicæ denuo limata, sive, Potius fabricata
• Clavis mathematicæ denvo limata, sive, Potius fabricata
• Clavis mathematicæ denyo limata, sive, Potius fabricata