Looking at newton-devel, the <seg type="parallel"> elements used to mark parallel passages in 3973 and 3975 appear to be causing unwanted line breaks in 3973 (ALCH00109) and presumably 3975 (ALCH00110).
For example, here on 19r, "same" and "precipitate" belong to different <seg> and there is an unwanted line break between them:

The TEI behind this:
