1. Machines for making ice, using sulphurous acid or ammonia in the process Author(s): Raoul, Pictet & Co., author. Publication: Philadelphia : Merrihew & Son, printers, [1879] Subject(s): Refrigeration -- methodsIceSulfidesAmmoniaEquipment and Supplies
2. A process of obtaining a dry cold current of air from ice, and its different applications Author(s): Schooley, John C. Publication: Cincinnati : Abbott & Kinney, printers, 1855 Subject(s): Refrigeration -- methodsIcePatents as Topic
