Campden Tablets. They can also be used as a sterliising solution made from 5 crushed tablets in 1pt hot water.
Campden Tablets 100 - Homebrew - Better Brew for Wine, Beer, Cider & Mead making
CAMPDEN TABLETS 25'S FOR HOME BREW, CIDER & WINE MAKING & STERILISATION
Homebrew-Youngs Wine Beer Brewing Campden Tablets (100's)
Beer Commercials of the 50s and 60s (DVD)
Hunter Vintage Green 50s Enamel Cork Press Country Kitchen Decor Kitchenalia