Storage structure with breathing means

Claim 1

APPARATUS FOR THE STORAGE AND PROTECTION FROM DECOMPOSITION OF MATERIAL SUBJECT TO CHANGE DUE TO CONTACT WITH THE ATMOSPHERE COMPRISING A SUBSTANTIALLY GASTIGHT ENCLOSURE FOR SAID MATERIAL HAVING A MAIN FLOOR, A SUB-FLOOR SPACED BENEATH THE MAIN FLOOR, A PLURALITY OF ELONGATED, ARCUATE TUNNEL ELEMENTS HAVING PARALLEL LONGITUDINAL EDGES RESTING ON THE SUB-FLOOR AND INCLUDING END CAPS WHICH HAVE LOWER EDGES ALSO ENGAGING THE SUB-FLOOR, SAID TUNNEL ELEMENTS DEFINING INDEPENDENT HOLLOW COMPARTMENTS BENEATH THE MAIN FLOOR, A FILL BETWEEN THE MAIN FLOOR AND SUB-FLOOR AND ENCASING AND COVERING THE TUNNEL ELEMENTS, GAS COMMUNICATING PIPE ELEMENTS SERIALLY CONNECTING SAID COMPARTMENTS AND FORMING A CONTINUOUS CONDUIT COMPOSED OF SAID PIPE ELEMENTS AND COMPARTMENTS, MEANS CONNECTING ONE END OF SAID CONDUIT WITH THE INTERIOR OF SAID ENCLOSURE AND OPERABLE TO PERMITT FLOW OF GAS INTO SAID CONDUIT THROUGH SAID ONE END AND FROM SAID CONDUIT INTO SAID ENCLOSURE UPON EXPANSION OR CONTRACTION OF THE GAS IN SAID ENCLOSURE, AND MEANS CONNECTING THE OTHER END OF SAID CONDUIT WITH THE ATMOSPHERE.