If we try marmalade as a succedaneum, we are no better off--at least if we put any faith in "real Dundee, an excellent substitute for butter," to be seen piled in heaps in the cheap grocers' windows. Dr. Hassall's analysis proves that this dainty is adulterated to a large extent with turnips, apples, and carrots: we need not grumble so much at these vegetable products, excepting on the score that it is a fraud to sell them at 7d. a pound; but there is the more startling fact that, in twelve out of fourteen samples analysed, copper was detected, and sometimes in large and deleterious quantities! Accum, in his "Death in the Pot," quotes, from cookery-books of reputation in his day, recipes which make uninitiated persons stare. For instance, "Modern Cookery, or the English Housewife," gives the following serious directions "to make Greening:"--"Take a bit of _verdigris the bigness of an hazel-nut_, finely powdered, half a pint of distilled vinegar, and a bit of alum-powder, with a little baysalt; put all in a bottle and shake it, and let it stand till clear. _Put a small teaspoonful into codlings, or whatever you wish to green!_" Again, the "English Housekeeper," a book which ran through eighteen editions, directs--"to make pickles green _boil them with halfpence_, or allow them to stand for twenty-four hours in copper or brass pans!" Has the notable housewife ever wondered to herself how it is that all the pickles of the shops are of so much more inviting colour than her own? We will satisfy her curiosity in a word--she has forgotten the "bit of verdigris the bigness of a hazel-nut," for it is now proved beyond doubt that to this complexion do they come by the use of copper, introduced for the sole purpose of making them of a lively green. The analyses of twenty samples of pickles bought of the most respectable tradesmen proved, firstly, that the vinegar in the bottles owed most of its strength to the introduction of sulphuric acid; secondly, that, out of sixteen different pickles analysed for the purpose, copper was detected in various amounts. Thus, "two of the samples contained a small quantity; eight rather much, one a considerable quantity, three a very considerable quantity; in one copper was present in a highly deleterious amount, and in two _in poisonous amounts_. The largest quantity of this metal was found in the bottles consisting entirely of green vegetables, such as gherkins and beans."