This listing is by no means exhaustive, and is limited by the time I have to review and upload files; so it's bound to grow over time. Depending on the subject, some dissertations stand perfectly on their own; others are more meaningful in the context of specific projects.
I am giving priority to texts that I think new students will benefit most from having access to.
Tim Ahrens: Size-specific adjustments to type designs (2007)
Eduardo Berliner: Problems relating to the translation of a drawn letterform to a digital typeface (2003)
Jose Scaglione: Test procedures: Problems related to the use of laser printers for typeface design (2005)
Malou Verlomme: Technological shifts in type design and production (2005)
Veronika Burian
Will Hill (latest version?)
Wolfgang Homola
Mitja Miklavčič Neo-grotesque sans serifs of the 1950s and 1960s (2006)
Dan Rhatigan
Alice Savoie French type foundries in the twentieth century (2007)
Juliet Shen
Gaby Varela
Sandra Winter Anna Simons: scribe, lettering artist, and teacher (2006)
Jo De Baerdemaeker
David Březina
Victor Gaultney
Patrick Giasson
Tom Grace: Considerations for the design of foreign-script typefaces (2003)
Fernando Mello: Evolution of Tamil type design (2007)
Titus Nemeth