Okay, this is just plain gross. I understand this sort of thing happens; nonetheless, I didn't expect to find this in a 1942 issue of Woman's Day. Besides, feminine mephitis isn't really a technical or scientific term - it was probably made up for this ad. "Mephitis" is either a genus of skunk or simply a term for a foul emination.
Also, Zonite is "Dakin's solution" (sodium hypochlorite) which is essentially weak bleach. The product is still sold to this day.