1. A SYSTEM FOR PROVIDING A TEMPERATURE STABLE ENVIRONMENT, INCLUDING IN COMBINATION: (A) A FILAMENT WOUND CONTAINER; (B) ELECTRICAL CURRENT CONDUCTIVE MEANS WHICH IS CAPABLE OF GENERATING HEAT WHEN ENERGIZED BY A SOURCE OF CURRENT FORMED WITHIN THE WALL OF SAID FILAMENT WOULD CONTAINER; (C) CURRENT PRODUCING MEANS CONNECTED TO SAID CONDUCTIVE MEANS FOR ENERGIZING SAID CONDUCTIVE MEANS THEREBY CAUSING HEAT TO BE PRODUCED; (D) VARIABLE REGULATOR MEANS CONNECTED TO SAID CURRENT PRODUCING MEANS FOR VARYING THE AMOUNT OF CURRENT FLOWING THROUGH SAID CONDUCTIVE MEANS THEREBY VARYING THE AMOUNT OF HEAT BEING PRODUCED AND APPLIED TO THE INTERIOR OF SAID FILAMENT WOUND CONTAINER; (E) CONTROL MEANS RESPONSIVE TO THE INTERNAL TEMPERATURE OF SAID FILAMENT WOUND CONTAINER CONNECTED TO SAID VARIABLE REGULATOR MEANS FOR ACTUATING SAID VARIABLE REGULATOR MEANS SO THAT THE HEAT PRODUCED AS CURRENT FLOWS THROUGH SAID CONDUCTOR MEANS IS ADJUSTED THEREBY MAINTAINING THE INTERNAL TEMPERATURE OF SAID FILAMENT WOUND CONTAINER AT A PRESELECTED LEVEL; (F) RESISTANCE SENSING AND INDICATING MEANS ASSOCIATED AND CONNECTABLE WITH SAID CURRENT CONDUCTIVE MEANS AND SAID CURRENT PRODUCING MEANS FOR SENSING RESISTANCE VARIATIONS IN SAID CURRENT CONDUCTIVE MEANS AND THUS MONITORING PRESSURE VARIATIONS EXERTED ON SAID FILAMENT WOUND CONTAINER; (G) MEANS FOR SELECTIVELY CONNECTING SAID RESISTANCE SENSING MEANS TO SAID CURRENT CONDUCTIVE MEANS AND SAID CURRENT PRODUCING MEANS.