Check out Robert Gellerman's "The American Reed Organ and Harmonium" for
a stop dictionary and everything else you want to know about your reed
organ.  The stop you referred to is probably "Dulciana", not "Dulcrana."

There's a Reed Organ Society which has an Internet news group, and they'd
be happy to answer questions.  Here's the address:

    ros@mrc-bsu.cam.ac.uk

Larry Lobel