Mumler and the First Spirit Photographs
In 1861 the Boston engraver William Mumler found a translucent figure on a self-portrait and announced he had photographed his dead cousin. For years afterwards he photographed Civil War widows beside their dead — his most famous print shows Mary Todd Lincoln with the hands of the murdered president on her shoulders. New York tried him for fraud in 1869: P. T. Barnum appeared for the prosecution and produced a spirit portrait of his own, made in an evening. Mumler was acquitted because the court could not prove the method, but several of his ghosts were recognised as living Bostonians he had photographed earlier.
The Betz Sphere
On 26 March 1974 the Betz family, walking a burned-over patch of woodland on Fort George Island in Florida, picked up a steel ball some twenty centimetres across. At home it behaved oddly: it rolled about the table, came back to its owner, hummed and made the dog howl. The press announced an alien device. James Randi examined and weighed it and showed that the mystery was an offset centre of gravity and a slightly sloping floor, and that any hollow ball hums. The Navy laboratory at Jacksonville identified the material as 431 stainless steel and concluded it was a ball from a ball mill. The sculptor James Durling-Jones later said he had carried such balls in his van and lost some in exactly that area.
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