Example image of eyePlorer eyePlorer map for 'Canning': Food preservation Nicolas Appert Microorganism Packaging and labeling Botulism Clostridium botulinum Acid PH Pressure cooking Dairy Meat Poultry Seafood Vegetable Fruit Pickling Le Monde Napoleon I of France Napoleonic Wars Louis Pasteur Peter Durand Home canning Bayonet First French Empire France Six Days Campaign United Kingdom Bryan Donkin William Edward Parry James Ross Europe Novelty item Franklin's lost expedition Lead Northwest Passage Solder New York City Oyster American Civil War Crimean War Franco-Prussian War United Kingdom of Great Britain and Ireland Victorian era H. J. Heinz Company Nestlé Working class Calorie Field ration Trench warfare World War I