Abstract: A refrigerating system having multiple stages wherein each stage has a boiler for holding a solution of a first constituent being a gas dissolved in a second constituent being a liquid. The boiler communicates with a separator where the gas is separated from the liquid by the heat from the boiler and the gas is then passed to a condenser where it condenses to a liquid. The liquid first constituent passes to an evaporator. In one of the stages, the evaporating first constituent cools the region to be refrigerated in thermal contact with the evaporated of the respective stage. The gaseous first constituent then passes to an absorber where it dissolves in the second liquid constituent that has passed from the separator to the absorber. The solution of first and second constituents now passes to the boiler where the cycle is repeated.