Griffiths/Bryson found the original and secret version of this study. Comparing it to a different sanitized version, the reporters saw that evidence of adverse effects from fluorides had been suppressed by the US Atomic Energy Commission.
Other studies during the same period were conducted at the University of Rochester. Unwitting hospital patients were given fluorides to test out the results.
Flash forward. Enter Dr. Phyllis Mullenix (see also here), the head of toxicology at Forsyth Dental Center in Boston. In the 1990s, Mullenix did a series of animal studies which showed that, as Griffiths/Bryson write: “…fluoride was a powerful central nervous system (CNS) toxin…”
Mullenix applied for further grant monies from the National Institutes of Health. She was turned down. She was also told that fluorides do not have an effect on the CNS.
But Griffiths/Bryson uncovered a 1944 Manhattan Project memo which states: “Clinical evidence suggests that uranium hexafluoride may have a rather marked central nervous system effect…it seems most likely that the F [fluoride] component rather than the [uranium] is the causative factor.”