First published in 2006. The Jam Book is a practical guide to the preservation of fruit- not only jams, but also jellies, marmalades preserves, conserves, cheeses; pastes, butters, chips; crystallised, candied, and brandied fruit; fruit dried and fruit bottled. The object of preserving fruit is to ward off, exclude or neutralise those bacilli which otherwise would cause its almost immediate decay. A heavy solution of sugar; a strong acid, like vinegar;...