Euclid's five postulates and eleven common notions
Foundations of geometry, listed on a sheet reproduced upside down
Reproduced upside down, this small sheet sets out the axiomatic foundations of geometry: a right-hand column declaring that 'the postulates are 5' and listing them first through fifth, and a left-hand column stating that 'the common notions are 11' and enumerating them, each keyed to small numbers. A further block gives numeric cross-references among the propositions. The drawings are schematic triangles, thin filled wedges and two concentric circles that accompany the axioms; further faint text and diagrams are present but not transcribed.
On this page
The five postulates and the eleven common notions
One column announces that the postulates are five and names them first through fifth, while the other states that the common notions are eleven and lists them in order. Together they lay out the Euclidean groundwork on which the surrounding constructions depend.
Numeric cross-references among the propositions
A separate block strings together numbered pointers such as '17 - by 16th - by 13' and '18 - 1 for the 5th - 2 - 3 - 4 - before the 5th'. These appear to key individual steps of the work back to particular postulates and propositions.