In this note we present a reconstructive algorithm for solving the cross-sectional pipe area from boundary measurements in a tree network with one inaccessible end. This is equivalent to reconstructing the first order perturbation to a wave equation on a quantum graph from boundary measurements at all network ends except one. The method presented here is based on a time reversal bound... https://www.jmannino.com/limited-find-We-The-People-Flag-Unisex-Poly-Rich-Blend-Tee-great-choice/