| http://www.w3.org/ns/prov#value | - 1 When this pamphlet was first printed, a copy of it was sent by Mr. Cadwallader Colden to the celebrated Gronovius, with a letter from which the following is an extract:???I send with this a curious and new invention for warming a room with a small fire, and more effectually than can be done by a large fire, in the common method, and is free of the inconveniences which attend the Dutch and German
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