I'm old enough to have a vague memory of clothes so white that they were called bright. This happened despite the absence of additives — the ridiculous varieties of sprays and bottles and packets that festoon our cabinets today and that we throw into the wash to try to boost the cleaning power of our pathetic machines and increasingly useless laundry soap. Then, the other night, I experienced an amazing blast from the past. I added a quarter cup of trisodium phosphate (TSP) and otherwise "treated" nothing. The results were nothing short of mind-boggling. Everything was clean — clean in...