Città del Vaticano, Biblioteca Apostolica Vaticana, Cod. 150

Language	Latin
Composite ms.	3 parts
No. of ms. part	I-III
Material	Membr.
No. of leaves	I, 170
Cover	Membranac.
Condition	In dorso grandibus litteris: chrysostomi et augustini nonnu(lla) laurentii decani in obitum gisleber(ti) (e)t algorismus (et al(ia); inferius alexandri num.: 962; et superius Reg. num.: 1478
No. of hands	3 vel 4
Type of writing	minutissima (exc. 164-168v)

Work 1	Century	12
	No. of ms. part	I
	Height × width	150 x 103
	No. of leaves	152
	Gatherings	undeviginti quaterniones, litteris signati praeter ultimum
	Condition	pessima membrana
	No. of hands	1
	Lineation	24
	Initials etc.	Inscriptiones rubrae; primum principium grandis littera rubris ornamentis exornat; ceterae vel virides vel rubrae; lineamenta virida vel rubra
Work 2	Author standard	Pseudo-Chrysostomus
	Title (standard)	Homiliae triginta
	No. of ms. part	I
	Item no.	1
	Folio no.	1-77
Work 3	Author standard	Augustinus
	Title (standard)	Sermo in natale sancti stephani
	No. of ms. part	I
	Item no.	2
	Folio no.	77-79
	Glosses etc.	(77, 79) card. Mai inscripsit: ed(itum)
Work 4	Title (standard)	De viciis et virtutibus
	No. of ms. part	I
	Item no.	3
	Folio no.	101v-145v
Work 5	Title (standard)	De miraculo quomodo petrus ignitus transivit
	No. of ms. part	I
	Item no.	4
	Folio no.	146-152
	Additional texts	(152v) Ad Christum Berengarii metrica oratio
	Glosses etc.	(147v) animadversio Pauli Patavii
	Scribbles	(152-152v) probationes pennarum
Work 6	Century	12
	No. of ms. part	II
	Height × width	c. 135/140 x 105
	No. of leaves	153-163
	Gatherings	2 quaterniones
	Condition	Semifolia iam prius acu exarata fuerant, posterius ad novum librum conficiendum decurtata sunt
	No. of columns	2 cols. (153-156)
	Lineation	23-24 (153-159), 33-38 (159v-163)
	Initials etc.	Inscriptiones et princip. litterae rubrae
	Other notes	Extrema pars est alicuius codicis qui, saec. 16 in. in antiquo monasterio Sancti Michaelis in Eremo prope Lucionem, in Pictonica provincia servabatur, atque, saec. 12 post medium, ibidem scriptus est, videlicet a tribus coaequalibus librariis
Work 7	Author standard	S. Bernardus Claraevallensis
	Title (standard)	Apologiae ad Guillelmum
	No. of ms. part	II
	Item no.	1
	Folio no.	153-155v
Work 8	Title (standard)	Varia Excerpta
	No. of ms. part	II
	Item no.	2
	Folio no.	156
Work 9	Title (standard)	De funere Gisleberti Porretani
	No. of ms. part	II
	Item no.	3
	Folio no.	156v-159
	Glosses etc.	(156v) card. Mai indicavit: ed(itum)
Work 10	Author standard	Acardus de Arroasia
	Title (standard)	De templo Salomonis carmen
	No. of ms. part	II
	Item no.	4
	Folio no.	159v-163
	Glosses etc.	(163) nota Pauli Petavii; (163v): Iste liber pertinet Conventui/ Sancti Michaelis in heremo; idem subinde prolixa et gallica subscriptio
	Blank leaves	163v, praeter sententiam, vacat
Work 11	Century	13
	No. of ms. part	III
	Height × width	150 x 60 (usque ad 168v)
	No. of leaves	164-170
	Gatherings	7 semifolia
	Type of writing	Minutissima (praeter Algorismus)
	No. of columns	2 cols. (169-170v)
	Lineation	30 (164-168), 60-67 (169-170v); lineae plumbo ductae
Work 12	Author standard	Alexander de Villa Dei
	Title (standard)	Metricus algorismus
	Contents	(168v) de progressione rigmaticum tetrastichon; de compoto et computatione tria disticha
	Incipit	Hec algorismus ars prescus dicitur esse. (in qua post. add.) /Talibus indorum fruimur bis quinque figuris./ 0. 9. 8. 7. 6. 5. 4. 3. 2. 1. Primaque significat unum, duo vero secunda
	No. of ms. part	III
	Initials etc.	(164) principalis litt. rubra; (164-170) particulae rubro divisionis signo distinguuntur;
	Item no.	1
	Folio no.	164-168v
	Explicit	Si tres sive due series sint pone sub una:/ A dextris digitum servando prius documentum. Explicit
	Additional texts	(164-166, 166v, 167v, 168) commentatio: ... algorismus ab inventore s(cilicet) ab algo quod est inductio et rismus quod est numerus; 168v) verbi gracia I. III. V. VII. sume IIII et multiplica per se et erunt XVI summa totalis numeri
	Glosses etc.	(164-168v) arabici numeri
	Scribbles	(165, 167) probationes pennarum
Work 13	Title (standard)	De ethimologiis et significationibus metricus tractatus
	No. of ms. part	III
	Item no.	2
	Folio no.	169-170