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TIL of the saluting trap. British army conscripts would form a large group, then one by one walk to an officer. Each would salute, forcing him to salute back. The goal was to force the officer to salute as many soldiers as possible as fast as possible to make his arm sore.

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md6y TIL that jams are made from fruit, while jellies are made from juice. Preserves have chunks of fruit, conserves have dried fruit or nuts, and marmalades have peel and pulp. Fruit butters are slow cooked to a smooth consistency.
1aWw4 TIL That the inventor of petroleum jelly ate a spoonful every day, claiming it had tremendous health benefits. He lived to be 96. He also, reportedly, during a serious bout of pleurisy in his mid-50s, had his nurse rub him from head to foot with the substance. He soon recovered
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