Two papers by William Rowan Hamilton were published in volume 5 of the Proceedings of the Royal Irish Academy, on the subject of the geometrical interpretation of some results obtained by calculation with biquaternions.

A paper by Hamilton entitled

was published in volume 5 of the Proceedings of the Royal Irish Academy (1853), pp. 100-101.On the Geometrical Intepretation of some Results obtained by calculation with Biquaternions

This paper is available in the following formats:

A paper by Hamilton entitled

was published in volume 5 of the Proceedings of the Royal Irish Academy (1853), pp. 407-415.On the Geometrical Demonstration of some Theorems obtained by means of the Quaternion Analysis

This paper is available in the following formats:

- Plain TeX and MetaPost input file (with two figures)
- PostScript

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D.R. Wilkins(

School of Mathematics

Trinity College, Dublin