“As long as the faculty of perceiving the Aura is confined to a few individuals, and ordinary people have no means of corroboration or refutation, the door to imposture is open. Since this has been the case up to the present time, the subject has always been looked on askance…”
“…but there is no more charlatanism in the detection of the human Aura by the methods we employ, than in distinguishing microbes by the aid of the microscope.”
“The main difference lies in the claim of some people that they are able to perceive the one through the possession of abnormal eyesight, while no one has had the hardihood to assert that they had the power of seeing an object one-thousandth of a millimeter in length…”
"Some friends…recommend the real name of the dye employed to be divulged. This we are quite willing to do, only it is too late to alter the term ‘Spectauranine’ throughout the text, as the book is in the hands of the printers. The real name of the dye is Dicyanin."
“The blue screens accompanying the book merely contain a solution of dicyanin, and the red contain carmine. These four screens are the only ones necessary for ordinary observations of the Aura. There is evidently a great difficulty in the manufacture of these thin flat cells…”
“…as we could find no one in Great Britain or in America who would undertake to make them, but at last we have succeeded in finding a foreign firm able to construct them.”
“Subsequently solutions in alcohol of different strengths in glass cells were employed. These seem on the whole to be satisfactory, but there is tendency after a time for colour changes to take place, even if kept in the dark as much as possible.”
“After a few minutes we were surprised to find that we could continue to see the Aura without the intervention of the screen. This power did not last long. However, it was renewed by looking at the light for a few seconds through a dark screen.”
“We discovered to our cost that the spectauranine had a very deleterious effect upon our eyes, making them very painful, so much so that it was necessary to cease work for some days.”
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