To answer the queries concerning penetrability of ~1 μT,
physiologically patterned, time-varying magnetic fields through the cranium,
the proportions of attenuation through thicknesses and densities of ~3 times
that of the human skull were measured directly. There was no reduction in the
intensity of the magnetic field when two
 J. H. McElhaney, J. L. Fogle, J. W. Melvin, R. R. Haynes, V. L. Roberts and N. M. Alem, “Mechanical Properties of Cranial Bone,” Journal of Biomechanics, Vol. 3, No. 5, 1970, pp. 497-511. doi:10.1016/0021-9290(70)90059-X
 K. S. Saroka, B. P. Mulligan and M. A. Persinger, “Ex perimental Elicitation of an ‘Out-of-Body’ Experience and Concomitant Cross-Hemispheric Electroencephalo graphic Coherence,” Neuroquantology, Vol. 8, 2010, pp. 466-477.
 M. A. Persinger, K. S. Saroka, S. A. Koren and L. S. St Pierre, “The Electromagnetic Induction of Mystical and Altered States within the Laboratory,” Journal of Con sciousness and Research, Vol. 1, 2010, pp. 808-830.
 K. S. Saroka and M. A. Persinger, “Detection of Electromagnetic Equivalents of the Emotional Characteristics of Words: Implications for the Electronic-Listening Generation,” Open Behavioral Sciences Journal, Vol. 5, 2011, pp. 24-27. doi:10.2174/1874230001105010024
 L. J. Martin, S. A. Koren and M. A. Persinger, “Thermal Analgesic Effects from Weak, Complex Magnetic Fields and Pharmacological Interactions,” Pharmacology, Bio chemistry and Behavior, Vol. 78, No. 2, 2004, pp. 217-227. doi:10.1016/j.pbb.2004.03.016
 L. S. St-Pierre and M. A. Persinger, “Experimental Facilitation of the Sensed Presence Is Predicted by Specific Patterns of Applied Magnetic Fields Not by Suggestibility: Re-Analyses of 19 Experiments,” International Journal of Neuroscience, Vol. 116, 2006, pp. 1-18.
 B. T. Dotta and M. A. Persinger, “‘Doubling’ of Local Photon Emissions When Two Simultaneous, Spatially Separated, Chemiluminescent Reactions Share the Same Magnetic Field Configurations,” Journal of Biophysical Chemistry, Vol. 3, No. 1, 2012, pp. 72-80. doi:10.4236/jbpc.2012.31009