Identity area
Reference code
Add. MS c/67/112
Title
Letter from Augustus De Morgan to Robert Leslie Ellis
Date(s)
- 28 Dec. 1855 (Creation)
Level of description
Item
Extent and medium
1 folded sheet, 1 single sheet
Context area
Name of creator
Repository
Archival history
Immediate source of acquisition or transfer
Content and structure area
Scope and content
He admits that Columbus' egg is a myth. Discusses the relationship of obtuseness or acuteness of sides to obtuse and acute angles in a spherical triangle and proposes a theorem; has found nothing in the literature of the affections of oblique triangles. Accompanied by a drawing of a [spherical triangle?] with the note, "Yours came in after I had written the above. You are right, as here appears."