Edward Hope Kirkby They are buried together at Waverley Cemetery. So ended a life of invention largely unrecognised as biographers of George Taylor and Archibald Shaw claimed all the credit for them for Kirkby’s endeavours. Edward Hope Kirkby was a jeweler watchmaker in Williamstown who eventually became a manufacturing electrician making systems of fire protection, in 1908 he invented and patented the first automatic sprinkler alarm. He is first recorded as experimenting with X-ray in September 1896 This is only 9 months after Roentgen presented his discovery of X-rays. He is reported as experimenting with the medical staff at Williamstown Hospital later that
Roentgen (unit) the accompanying text. In the meantime, the new concept of roentgen equivalent man (rem) had been developed. Starting in 1957, the ICRP began to publish their recommendations in terms of rem, and the roentgen fell into disuse. The medical imaging community still has a need for ionization measurements, but they gradually converted to using C/kg as legacy equipment was replaced. The ICRU recommended redefining the roentgen to be exactly 2.58 × 10 C/kg in 1971. In 1971 the European Economic Community, in Directive 71/354/EEC, catalogued the units of measure that could be used "for ... public health ... purposes". The