While not a "joke" per se, I thought many here would get a laugh or two out of this text entitled "Plain Facts for Old and Young" by John Harvey Kellogg, MD. Yes, that is the "Kellogg" of "Kellogg's Cereal." It was written in 1881 and while we may find it amusing today--people back then, sadly, took its advice quite seriously.

I was browsing through it and found sections on "Electricity" and "Sounding." So Kellogg was into "electrical play"! Who knew! I'll bet you won't think about "Corn Flakes" the same way ever again!

http://www.gutenberg.org/files/19924...-h/19924-h.htm