A paper of Hamilton, entitled
On some Extensions of Quaternionsappeared in installments in the Philosophical Magazine in 1854-5.
This paper is available in the following formats:
A summary of some of the main results proved in Hamilton's paper On some Extensions of Quaternions was published in volume 6 of the Proceedings of the Royal Irish Academy (1858), pp. 114-115.
This summary is available in the following formats: