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Image taken from page 232 of 'A treatise on the distillation of Coal-Tar and Ammoniacal Liquor, and the separation …

water heater' hi-res stock photography and images - Alamy

water heater' hi-res stock photography and images - Alamy

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Gas water heater hi-res stock photography and images - Alamy

water heater' hi-res stock photography and images - Alamy

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