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The work of Dr. Philip S. Callahan f the sixty-five mysterious medieval structures called Round Towers so far located in the lush green countryside of Ireland little is known other than the fact that they are geodetically and astronomically placed and oriented, evidently for some special reason, their windows designed to cast shadows to indicate the day of the solstice or the equinox. That they might be anten- nas used by medieval Irish monks to cap- ture cosmic waves was Callahan’s surpris- ing new theory. During WWII, while stationed at Belleek, Callahan often visited one of these Round Towers on nearby Devenish Island situated in the middle of Lough Erne. He learned that the local farmers went to considerable effort to barge cows back and forth to the island, purely because the grass was finer than on the mainland. Upon obtaining a map of Eire, marked with the locations of all its then-known rounded towers, Callahan noticed the posi- tions of the towers formed what looked like a star map of the northern night sky at the moment of the December solstice. Was there a link between the lush green grass and the position where it stood? Could the round tower be acting as an antenna for some cosmic energy broad- cast? The fact that in 1932 Dr. Karl G. Jansky of the Bell Laboratories had first discovered radio waves from the cosmos and had measured those from that particu- lar part of the sky as arriving in 14.6 meter wavelengths, seemed more than just coin- cidental. It struck Callahan that the Devenish Tower, precisely positioned and shaped, might be resonating to cosmic radio wave- lengths, as well as to some kind of mag- netic-field energy. The fact that it consist- ed of paramagnetic rock also pointed in that direction. To find out, he began to experiment with small-scale models made of paramagnetic sandpaper and later carborundum, using the exact dimensions published in Prof. G.L. Barrow’s book “The Round Towers of Ireland”, producing a model of the Devenish Island tower. With a high fre- quency oscillator called a klystron to gen- erate a 3cm wavelength of radio energy, he placed his Kilmacduagh 10cm wide sandpaper model within a radio beam and sure enough, the power meter went up from six to nine decibels of energy, a clear indication that the Irish Round Towers were in fact radio-wave guides, acting the way a magnifying lens does to collect and focus light. This conclusion also resolved for Callahan the | resonant cavity mystery of why the doors to the towers were invariably set many feet above the level of the ground. No matter how mathematically accu- rate electrical engineers design their antennas, says Callahan, their figuring sel- dom provides a_ sharp enough resonance. Antennas need to be shortened or antennas, Callahan set out to show mag- lengthened by trial and error to conform netic field lines of force on one of his mod- with an incoming wavelength. To tune _ els similar to those shown by iron filings their stone antennas to the night sky radia- on a sheet of paper under which a magnet tion, says Callahan, the tower builders is placed. In theory these would appear as merely needed to fill each of the interiors rings at different levels. To make them vis- with dirt up to a level required to obtainthe — ible he decided to soak a carborundum appropriate incoming frequency. model of the Turlough Tower in County To further prove the contention that the Mayo in a solution of Epsom salts for 48 Irish Round Towers were paramagnetic hours in the hope that this diamagnetic salt Sun Tapp anton ui ee Bd aber 40 iret a= tm - Gh- wong (Rl aren NEXUS - 18 roo Toe YEAR BOOK - FEBRUARY 1991