I too felt that the whole thing could have been better expressed.
The document references in the notes may be explained elsewhere, but mean nothing to me.
By the way, Stift could be a seminary or perhaps some other kind of religious institution.
I assumed monastery.
Zinsen means interest (on a loan). Doesn't quite fit, and anyway it's in the singular here.
I suspect they were dealing in land leases, which pay a dividend in the form of rents.
I also assumed that Pfd and ß are pound and shilling, with the final h indicating something like Hamburg or Hannover currency. But we have a grand mixture of florins and guilders (which may be the same, as they were in Holland until fairly recently) and Heller (a very small coin) and more.
The fact that nobody else seems to have attempted a translation makes me think it's perhaps not just my inadequate command of German!
