Hot dry rock geothermal energy as a separate state from that of the continuum of permeable rock—just as one would consider a completely closed faucet as distinct from one that is open to any degree, whether the flow be a trickle or a flood. In the same way, HDR technology should be regarded as totally distinct from EGS. A definitive book on HDR development, including a full account of the experiments at Fenton Hill, was published by Springer-Verlag in April 2012. Hot dry rock geothermal energy Hot dry rock (HDR) is an abundant source of geothermal energy available for use. A vast store of thermal
Orient Hotel, The Rocks single storey shop, which were the first stage of what evolved over the nineteenth century into the Orient Hotel. The residence was one of the most valuable on George Street North on its completion and fitted, according to the council assessor, with every convenience on its first entry in the rate book for Gipps Ward in 1845. Chapman by the 1840s had arguably some standing in the local community for he was a foundation councillor of the City Corporation (Council) in its first term of 1842-1845; he represented Gipps Ward that took in The Rocks. His business was evidently quite