|Letter from Sylvester O'Sullivan, 9 Lower Ormond Quay, Dublin, to the [Earl of Rosse] President of the Royal Society
|31 January 1850
|Enclosing a copy of his construction and demonstration of the trisection of the angle. O'Sullivan explains the background of his work and details his methods.
[Enclosure not present in volume, see related record.]
|Related records in the catalogue