(Found on page 438 of the 1904 Electrical Age) The top picture shows the CD 317.8 without the other stacking pieces arcing at 118 kilovolts under a spray of water. The bottom picture shows the same CD 317.8 with another stacking piece added to the assembly, arcing at 157 kilovolts while being tested under a spray of water. See the [id=422457052; Previous Photo] to see the full CD 317.8 stacker assembly.