I have added a picture of a rare Dalian themeing piano roll at my
own web site.  The system was marketed briefly around 1913 but was
commercially unsuccessful.  The rolls have perforations punched with
different width holes.

In the photo you can see the solo theme notes have full wide
perforations whilst normal notes have chained perforations, commencing
with a standard punch hole.  According to Ord-Hume's book, each note
in the Dalian player had its own damping pneumatic and regulator.  The
rolls were made by the Perforated Music Company on their "Linenized"
label but marked "Dalian" on the leader.  The rolls play the full
88-note scale and do not have Themodist-type perforations.

Can anyone shed any light on the Dalian system more than this?  Does
anyone have one or know of one still in existence?

Check out the photo on page 2 of the roll scans pictures at;-
http://website.lineone.net/~agr/index2.html

Adam Ramet