Downloading a score to Music Reader for iPad

[pstein]

Are many of the scores on IMSLP capable of downloading to an iPad music reader?
How do you find the icon on IMSLP that tells you if you can download it?

[Sallen112]

When you open a PDF after downloading, tap the screen on the PDF and a message at the bottom will appear saying "Open in..." and a list of Apps that are eligible to open in will appear.