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Haricots, Green, to Preserve
In order to preserve these vegetables for winter use, gather them on a dry day, and put them at once into wide-mouthed bottles, cork securely, and put them into a saucepan of cold water. Let them remain in the water for an hour after it boils, tie a bladder over the corks, and keep the bottles in a dry place. Probable cost, 2d. per pound.
This is home bottling of a low-acid vegetable by a method that cannot reach or hold a safe temperature. The points below explain why the technique fails rather than how to adapt it.
- Botulism is the specific riskGreen beans are low-acid (pH well above 4.6), which is exactly the condition Clostridium botulinum requires to grow in a sealed, oxygen-free jar. Its spores can survive hours at boiling-water temperature; the toxin they later produce is one of the most lethal substances known and gives no reliable warning in smell or appearance.
- An hour in boiling water is not a processWater boils at 212F at sea level and no longer. Destroying botulinum spores in a low-acid vegetable requires 240-250F, which is only reached under pressure. The hour here inactivates spoilage organisms that would have warned you the jar had gone off, while leaving the dangerous ones intact.
- Cork and bladder are not a sealA cork tied over with a dried bladder was the Victorian answer to airtightness. It is unlikely to hold a reliable vacuum, and a partial seal on a low-acid vegetable offers no protection: it excludes air without excluding risk.
- Nothing in the recipe is measuredThere is no headspace, no acidification, no salt weight, no jar size and no altitude allowance. Modern preserving safety rests entirely on those numbers, and none of them can be reconstructed from this text.
- "Gather on a dry day" is the whole of the sanitationField soil is the principal source of botulinum spores on green beans. Washing and blanching reduce the load but do not remove it, and this recipe does neither.
- If you want to keep beansFollow a current tested procedure from a national food-preservation authority for pressure canning, or freeze them after blanching. Do not adapt the method above.
- Reading the cost note"2d. per pound" is twopence in pre-decimal sterling, a price marker for the household book's readers rather than any instruction.
Cassell's belongs to the long stretch between the invention of bottling and the invention of a way to test whether it had worked. Nicolas Appert's sealed-and-heated bottles, publicised in France in 1810, showed that food heated in a closed vessel kept, and the technique spread through English domestic manuals for the rest of the century as a way to carry garden produce into winter. What nobody in a Victorian kitchen had was a theory of heat-resistant spores; the organism responsible for botulism is generally said to have been isolated in the 1890s, though sausage-borne cases had been described earlier, and pressure canning for low-acid vegetables became standard household advice much later. The bladder tied over the cork is the period's signature closure, used for jams, pickles and medicines alike, though it dates the entry only loosely. It is worth reading as a record of how the winter larder was stocked, not as a method.