Jordanus

Oxford, Bodleian Library, e Musaeo 155

Scribe(s)	John "Cokkes" (see Opera hactenus inedita R. Bacon. fasc. ix, p. xi)
Century	15 in.
Place of origin	England (Oxford)
Language	Latin
Previous owners	Presented by (Sir) Richard Worseley in 1607.
Material	Membr.
Height × width	9 1/8 x 6 in.
No. of leaves	pp. iv + 704
Gatherings	The signatures and quires divide the volume in six parts, beginning at pp. 1, 185, 431, 497 (?), 569, 591.
Cover	White leather on boards, with sheepskin cover, contemporary English work.
Initials etc.	With illuminated border (p. 591), capitals, &c.
Printed catalogs	F. Madan, H.H.E. Craster & N. Denholm-Young, A summary catalogue of western manuscripts in the Bodleian Library at Oxford II 2 (1937) 735-7 # 3705.
Source	Folkerts \| Madan et al. (1937)
Type of source	cat. \| pvt. notes
Source’s source	insp.

Work 1	Title (ms.)	Scientific treatises, among which are
Work 2	Author standard	Roger Bacon
	Title (ms.)	On the usefulness of mathematics
	Contents	The fourth part of the Opus Majus; ends with the geographical part.
	Incipit	Manifesto quod multe preclare radices
	Printed catalogs	P. Glorieux, Répertoire des maitres en théologie de Paris au 13^e siècle, 2 (1933) 63. A.G. Little, Roger Bacon's works with references to the mss. and printed editions, Roger Bacon essays, ed. A.G. Little (1914) 381 # 10.
	Printed copies	This MS. appears not to have been used by editors.
	Additional remarks	The signatures appear to be wrongly assigned so that some leaves have been wrongly bound; the continous taxt reads as follows: pp. 185-94, 219-22, 199-218, 195-8, 223-414.
	Folio no.	p. 185-
	Rubric	Pars quarta, in qua ostenditur potestas mathematice
	Explicit	requirat principalem scripturam.
	Tables	(p. 276b) A calendarial table.
	Math. drawings	With diagrams.
Work 3	Author standard	Petrus Peregrinus de Maricourt
	Title (ms.)	De Magnete
	Incipit	Amicorum intime
	Additional remarks	Without title or author's name. With a considerable addition at the end of the usual text.
	Folio no.	p. 414-