I've processed some more pictures from my recent trip to the Arnamagnæan Institute, which holds many medieval manuscripts in Old Norse.
Peter Springborg shows us how to read a manuscript
The star of the show was definately Reykjabók, a wood-bound copy of Njál's Saga from 1300 AD.
You can get a good view of the thickness of the wooden covers in this shot:
Of course, finding an unblemished piece of cow- or sheepskin was not always easy. Sometimes the animal had a scar or other imperfection in the skin, which resulted in texts like this:
Modern layout artists have enough trouble wrapping text around round graphics, imagine what it was like to be a medieval monk and have to write around a literal hole in the text.
Even if the parchment started off whole, it didn't always end up that way. If I recall the story correctly, the below example was cut into such a strange shape in order to fit into a piece of clothing -- perhaps a bishop's mitre? -- and provide structural support:
The Institute also has a number of more recent, though still quite old, texts. Here is what I believe to be the first printed edition of Njál's Saga, from the 18th-century, next to the 13th-century manuscript:
Finally, a jewel-like example of Sjællandske lov, the laws of Zealand from the middle ages until 1683. The curator's gloved hands give a sense of the size of this volume: