Yeah I've read the Wikipedia article, thanks. Apparently where I'm confused is; is the working of the siphon driven by pressure difference (i.e. the creation of the partial vacuum), or is it driven by the cohesion between the molecules? What I've seen appears to imply both.. but still.. yeah. Hope you could help me. Also, can a siphon really operate in a vacuum assuming the cohesion factor is taken out? Thanks.
For common liquids at ordinary room conditions, I think the pressure difference is the dominant effect. However, there are some weird substances where cohesion (is that the right word?) becomes a significant factor. For example, that slimy polymer goo that crawls up, over, and out of a beaker, once you get it started. https://www.elmhurst.edu/~chm/demos/siphonpolymer.html