My desire is to keep factual information flowing freely to anyone who has an interest in learning from ‘first principles’ — totally free of any pay-wall, annoying ads or popups. It does however cost money to maintain this site; which I am more than willing to continue funding out of my own pocket. More importantly though, is the time available to do fundamental research; which cost substantially more than maintaining this site. In short, your donations help divert more of my time, energy and effort into the time-consuming, yet rewarding research of setting the record straight. I hope you agree.