Multiple effect evaporator of the single horizontal body, nested shell type

Claim 1

A MULTIPLE EFFECT EVAPORATOR IN WHICH A SERIES OF EVAPORATE LIQUID BODIES OF A LIQUID TO BE CONCENTRATED BY EVAPORATION ARE NESTED ONE IN ANOTHER, EACH OF SAID EVAPORATIVE LIQUID BODIES BEING CONTAINED BETWEEN HORIZONTAL SOLID SHELLS ALSO NESTED ONE IN ANOTHER, EACH OF SAID EVAPORATIVE LIQUID BODIES FILLNG PARTIALLY A CHAMBER DEFINED BY SAID SHELLS, SAID MULTIPLE EFFECT EVAPORATOR HAVING MEANS FOR APPLYING INDIRECT HEAT TO THE INNERMOST OF SAID EVAPORATIVE LIQUID BODIES, SAID MULTIPLE EFFECT EVAPORATOR HAVING MEANS FOR BRINGING THE VAPOUR EVOLVING FROM EACH OF SAID EVAPORATE LIQUID BODIES EXCEPT THE OUTERMOST IN INDIRECT HEAT EXCHANGE RELATION WITH EACH NEXT OUTWARDLY EVAPORATIVE LIQUID BODY, SAID MULTIPLE EFFECT EVAPORATOR HAVING MEANS FOR CONDENSING THE VAPOUR EVOLVING FROM THE OUTERMOST OF SAID EVAPORATIVE LIQUID BODIES, SAID MULTIPLE EFFECT EVAPORATOR HAVING MEANS FOR WITHDRAWING THE CONDENSATE RESULTING FROM THE CONDENSATION OF THE VAPOUR EVOLVING FROM EACH OF SAID EVAPORATIVE LIQUID BODIES, SAID MULTIPLE EFFECT EVAPORATOR HAVING MEANS FOR INTRODUCING A FEED-LIQUID TO BE CONCENTRATED BY EVAPORATION INTO THE INNERMOST OF SAID EVAPORATIVE LIQUID BODIES, SAID EVAPORATIVE LIQUID BODIES BEING SERIALLY CONNECTED BY MEANS OF PIPES SO AS TO OBTAIN A FLOW OF LIQUID FROM EACH OF SAID EVAPORATIVE LIQUID BODIES EXCEPT THE OUTERMOST TO EACH NEXT ONE OUTWARDLY, SAID MULTIPLE