Wednesday, August 30, 2017

Magical Treasure Hunting

This is a history of treasure hunting from the middle ages to the present day, rather than a how to book. Nevertheless, it is well researched and despite being written by a university senior lecturer, is quite entertaining, although biased towards Europe, as medieval North America is largely undocumented. The study leads to the conclusion that treasure hunting in the medieval period was all about dealing with treasure-guarding angels, fairies and ghosts, where wizards were willing to face demons in order to get rich quick and resourceful tricksters exploited greed and stupidity, all watched by profit-seeking authorities. Generally speaking, most authorities regarded treasure hunting as benign and not evil like witchcraft. In the modern period treasure hunting evolved through searching for saintly relics to today’s method’s of researching, gathering and interpreting historical clues to find the treasure.
Interestingly, dowsing or divining has been used throughout the history of treasure hunting and another finding I picked-up on, was that flames, particularly blue flames were claimed to appear above buried treasures. Compare this with Louis Matacia, writing in Finding Treasure Auras, (1996). “When the full moon is highest in the night sky, the Indians would see a bluish-green flame glowing above the ground in the mountain. The glowing flame appeared to grow very slowly, reaching an impressive height and then retreating to the earth from whence it came…And this is where they found the silver and gold.” It seems the phenomenon of treasure auras existed well before the invention of the camera.
Going back to the book, I read it from cover to cover and found it a good read. First printed in hardback in 2011 and paperback 2012. The drawback, as with academic books in general, is the eye-wateringly high price. Even the E-book is priced at over £20.00 GB Pounds. You can always try and borrow the book from your local public library though.

Monday, August 07, 2017

The Colour of the Money

Buried metals interact with the earth’s magnetic field to emit electro-magnetic radiation. Radiation seems to be emitted across a spectrum of wavelengths from Near Infrared, through visible light to Ultraviolet. Different metals may have different dominant colours of radiation, as processed by the camera. This seems unrelated to the natural colour of the metal or alloy, since similarly coloured metals such as gold and brass do not necessarily produce the same colour radiation or aura. Colours can also change according to the size of the target. A single gold coin can produce a red aura and a bucketful will, presumably, also produce a red aura; a handful of iron junk, on the other hand, will produce a yellow aura but a lump the size of a car engine will produce a red aura. The colours do not work perfectly, unfortunately, but you can generally say that if the aura is not red then it will not be gold and you probably will not miss gold buried in an iron box. These colours are typical of the Canon camera using a long (Sigma) lens, which does not normally produce orbs.

The shorter Canon kit lens almost invariably produces an aura in the form of coloured orbs with a background colour. I believe the orbs form because of the geometry of the lens and is a function of radiation bouncing between the internal IR blocking filter or hot mirror and the rear of the external IR filter. Gold tends to produce multiple blue orbs on a red background and again, the size of the target may affect the numbers of orbs and colours.