Part ii

. _in the right order_, but continues it _without a break_ to the end of Conclusion 43 (p. 225); at the end of which is the colophon--Explicit tractatus astrolabii.

§ 17. Q.--MS. Ashmole 393, in the Bodleian Library; on paper. Of little importance.

R.--MS. Egerton 2622, in the British Museum. A neat MS., but without diagrams. Contains: Part I . (except 15-23);