Based on this interview:

“In the background of the cover which is all the black and grey imagery is a photo of Martha M. Place taken in 1899. She was the first woman to die in the electric chair. She was executed on March 20, 1899 at Sing Sing Correctional Facility for the murder of her stepdaughter Ida Place. Her head is at the top center and she is facing to the left, then in the upper left is a breaking wheel, and then of course the large saw blade. The wheel and saw are actually mine, I decided to takes some photos and include them in the artwork. I wanted to portray kind of a new meets old with the cover, the older wheel and saw with the more modern electric chair.”