This engraving (click for larger) is from Tornè-Chavigny's book, Influence de Nostradamus. The image was reprinted in The Nostradamus Encyclopedia(1).
First half guest Dr. Glen MacPherson has researched and documented a Hum heard by people all over the world. The sound is louder indoors than outdoors, and louder late at night than during the afternoon. In the more serious cases, the Hum can affect quality of life; in a number of documented instances, the torment of the noise has been life-altering. MacPherson shared the latest from his scientific investigation into the phenomenon, which seems to indicate that the culprit may be electromagnetic pollution by Very Low Frequency (VLF) waves. This was followed in the second half by Open Lines.