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Searching for Echoes in the Blue Mountains

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An Echo is a reflection of sound that arrives at the listener with a delay after the direct sound. The delay is proportional to the distance of the reflecting surface from the source and the listener. Typical examples are the echo produced by the bottom of a well, by a building, or by the walls of an enclosed room and an empty room. A true echo is a single reflection of the sound source.
Echo inGreek mythology is a mountain nymph whose ability to speak was cursed, only able to repeat the last words anyone spoke to her. Some animals use echo for location sensing and navigation, such as cetaceans (dolphins and whales) and bats.
The human ear cannot distinguish an echo from the original direct sound if the delay is less than 1/10 of a second. The velocity of sound in dry air is approximately 343 m/s at a temperature of 25 °C. Therefore, the reflecting object must be more than 17.2m from the sound source for echo to be perceived by a person located at the source. When a sound produces an …

Dr John Spark, (1853-1910) Katoomba’s First Doctor

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John Spark was born at Twickenham, Middlesex on August 8th, 1853, where his father held an extensive medical practice. John was the eldest son of a family of eight born to John and Emma née Pool, and with his sister Fanny, were the only survivors of childhood. At the age of 14, he lost his father, and was trained for the medical profession by his father's friends. He showed aptitude, and at the age of 18 was dispensing for a doctor with a large city practice.
Dr Spark,Lic. Soc. Apoth. Lond. 1875, M.R.C.S. Eng. 1875, trained at St Bartholomew's Hospital, gained the Licentiate of the Society of Apothecaries and was admitted Member of the Royal College of Surgeons. Later, at High Holborn, he conducted the city branch of a prominent West End doctor's practice, retaining the position for over seven years. He then went to Devonshire for a year, but the climate not suiting him, he took several trips to Australia and South America. Aged 30, he arrived in Australia as ship’s surgeon…

Walking Through History - Springwood Town Centre

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Historical Context
The area now known as Springwood was originally occupied by the Aurang-ora band of the inland Dharug people.

Crossing the Blue Mountains On Tuesday, May 11, 1813, Mr. Gregory Blaxland, Mr. William Went worth, and Lieutenant Lawson, attended by four servants, with five dogs, and four horses laden with provisions, ammunition, and other necessaries, left Mr. Blaxland's farm at the South Creek, for the purpose of endeavouring to effect a passage over the Blue Mountains.

On 13th May the explorers reached the vicinity of Springwood, “After travelling about a mile on the third day, in a west and north-west direction, they arrived at a large tract of forest land, rather hilly, the grass and timber tolerably good, extending, as they imagine, nearly to Grose Head, in the same direction nearly as the river. They computed it at two thousand acres. Here they found a track marked by a European, by cutting the bark of the trees. Several native huts presented themselves at differen…