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En:lneerln:. ROTARY ENGINE.-Nicholas J. Verret and Thomas H. Mooney, Pine Bluff, Ark. The engine devised by these inventors IS designed to be very effective in operation, utilizing the steam to the fullest advan tage, while being of very simple and durable construc· tion. It has an annular cylinder provided with slidable steam-eushloned abutments, an iulet and an exhaust por· tion opposite the sides of the abutments, and a revoluble piston having cam heads extending into the cylinder anddoi:10.1038/scientificamerican04171897-251d fatcat:7r5qbvftyzcmrpssj2xecryzsm