Are there any stems long enough to have at least 5 nodes (where the leaf joins the stem)? Cut off a stem, strip off the leaf or leaves at the lower two nodes. Put the cutting
in a small pot that drains well. Fill pot with regular potting soil. Take a pencil and stick it down to the bottom. Bury the cutting down where the two stripped nodes are in the soil. GENTLY firm the soil. Don't pack the soil. Keep it in a warm place out of direct sun and water it often enough that it is moist but not sopping wet. In about 2 weeks the top of the cutting should begin to leaf out, and that will mean that roots have developed. After a total of about a month, you can put it in a slightly larger pot. No rooting hormone is necessary.

eldo1960, I'm sorry that I didn't communicate the description and classsification
of the right philodendron. The one I have is a miniature split-leaf philodendron
selloum. Hopefully you will be able to help me again.

http://www.penyaseeds.com/tree-seeds/palms/split-leaf-philodendron.htm

I am also wondering if (from a regular large selloum philadendron) I could cut one of the aerial roots and get it to propogate another plant? I'm noping this will work. But I really have no idea. Thanks for any input.

Snowbird I really don't have any idea if one of the aerial roots would root.
Seems to me that they wouldn't.
Pat