Scans of many of the facsimiles of medieval chant manuscripts published by the monks of Solesmes in the series Paléographie musicale have now been made freely available online. But the descriptions attached to the scans in the Internet Archive do not include the number and title of each volume, which makes it impossible to find them by searching. To remedy this defect, I have compiled a list of links to all the volumes that I’ve been able to find so far. (Each link gives the name of the library where that scan was taken.) I will be grateful to receive e-mail notices of additional links, as well as of any broken links on this page: jesse [dot] billett [at] utoronto [dot] ca.

Original series (ongoing)

PalMus 1 (1889): Introduction générale [with 31 plates]; Le Codex 339 de la Bibliothèque de Saint-Gall (Xe siècle): Antiphonale missarum sancti Gregorii
Boston Public Library (only the Introduction générale, with some front matter missing; St. Gall 339 not included)
University of Ottawa (complete; St. Gall 339 begins here)

PalMus 2 (1891): Le répons-graduel “Iustus ut palma” [vol. 1, with plates 1–107]
Boston Public Library
University of Ottawa

PalMus 3 (1892): Le répons-graduel “Iustus ut palma,” deuxième partie [vol. 2, with plates 108–211]
Boston Public Library
University of Ottawa

PalMus 4 (1894): Le codex 121 de la Bibliothèque d’Einsideln (Xe–XIe siècle): Antiphonale missarum sancti Gregorii
Boston Public Library
University of Ottawa (1974 reprint)

PalMus 5 (1896): Antiphonarium Ambrosianum du Musée britannique (XIIe siècle): Codex additional 34 209 [facsimile volume]
Boston Public Library
University of Ottawa

PalMus 6 (1900): Antiphonarium Ambrosianum du Musée britannique (XIIe siècle): Codex additional 34 209; Transcription
Boston Public Library
University of Ottawa

PalMus 7 (1901): Antiphonarium tonale missarum, XIe siècle: Codex H. 159 de la Bibliothèque de l’École de medicine de Montpellier [introductory text volume, with essay on the tonic accent]
Boston Public Library
University of Ottawa (1972 reprint)

PalMus 8 (1901–1905): Antiphonarium tonale missarum, XIe siécle: Codex H. 159 de la bibliothèque de l’École de medicine de Montpellier; Phototypies [facsimile volume]
Boston Public Library
University of Ottawa (1972 reprint)

PalMus 9 (1906): Antiphonaire monastique, XIIe siècle: Codex 601 de la Bibliothèque capitulaire de Lucques
Boston Public Library

PalMus 10 (1909): Antiphonale missarum sancti Gregorii, IXe–Xe siècle: Le codex 239 de la Bibliothèque de Laon Graduel de Laon
Boston Public Library (scan begins incompletely)
University of Ottawa

PalMus 11 (1912): Antiphonale missarum sancti Gregorii, Xe siècle: Codex 47 de la Bibliothèque de Chartres
[No scan found so far]

PalMus 12 (1922): Antiphonaire monastique, XIIIe siècle: Codex F. 160 de la Bibliothèque de la Cathédrale de Worcester
Boston Public Library
University of Ottawa

PalMus 13 (1925): Le codex 903 de la Bibliothèque nationale de Paris (XIe siècle: Graduel de Saint-Yrieix
No scan of the PM facsimile found so far.

PalMus 14 (1931): Codex 10673 du fonds latin de la Bibliothèque vaticane: Graduel bénéventain (XIe siècle)
University of Ottawa (many pages missing)

PalMus 15 (1937): Le codex VI. 34 de la Bibliothèque capitulaire de Bénévent (XIe–XIIe siècle): Graduel de Bénévent avec prosaire et tropaire
University of Ottawa

PalMus 16 (1955): L’antiphonaire du Mont-Renaud: Antiphonaire de la messe et de l’office, Xe siècle (collection privée)
University of Ottawa

PalMus 17 (1958): Les manuscrits de chant liturgique de la Bibliothèque municipale de Chartres
University of Ottawa

PalMus 18 (1969): Le codex 123 de la Bibliothèque Angelica de Rome (XIe siècle): Graduel et tropaire de Bologne
University of Ottawa
PalMus 19 (1974): Graduel de Klosterneuburg
University of Ottawa

PalMus 20 (1983): Le missel de Bénévent VI-33
University of Ottawa

Deuxième série “monumentale” (discontinued after two volumes)

II/1 (1900): Antiphonale officii monastici écrit par le b. Hartker: No. 390–391 de la Bibliothèque de Saint-Gall
No scan of the PM facsimile found yet. The original manuscripts are digitized at e-Codices: MS 390 (winter); MS 391 (summer).

II/2 (1924): Cantatorium, IXe siècle: No. 359 de la Bibliothèque de Saint-Gall
No scan of the PM facsimile found yet. The original manuscript is digitized at e-Codices.