The Needles vehicles transporting disabled visitors. This is because the single track road's position close to the cliff edge is considered dangerous for multiple car use. The Isle of Wight Coast Path has its westernmost point at the Coastguard Cottages. The Needles' pointed shape is a result of their unusual geology. The strata have been so heavily folded during the Alpine Orogeny that the chalk is near vertical. This chalk outcrop runs through the centre of the Island from Culver Cliff in the east to the Needles in the west, and then continues under the sea to the Isle of Purbeck, forming
History of the Tesla coil frequency, which lighted a Geissler tube. This system, patented by Tesla on September 2, 1897, was the first use of the "four-circuit" concept later claimed by Guglielmo Marconi. However, Tesla was mainly interested in wireless power and never developed a practical radio "communication" system. He never believed that radio waves could be used for practical communication, instead clinging to an erroneous theory that radio communication was due to currents in the Earth. Practical radiotelegraphy communication systems were developed by Marconi beginning in 1895. By 1897 the advantages of narrow-bandwidth (lightly damped) systems noted by Crookes were recognized, and resonant circuits,