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Date:22nd of January 1797
Description:The letter above dated January 22nd 1797 refers to a man named Stephen Chesworth who was responsible for making boilers for the coal works. Chesworth's boilers were said to be 'worth double the sum of boilers in common'. The letter describes the advantages of iron boilers and the function of different types of boilers. The letter also refers to making engines by contract and making cylinder or piston boilers.