"Labyrinth Steam-Boiler," Abram Van Order, Ithaca, N.Y., Boiler for Steam-Engines or for other purposes

A. Van Order, Steam-Boiler Water Tube, No. 844, Patented July 17, 1838. https://patentimages.storage.googleapis.com/fa/75/a3/60dd7d7e6e5933/US844.pdf