Lance Moon

To be viewed correctly the X-ray must be placed onto a viewing screen. If the X-ray film is produced with a small `cut-out` in one corner this could then locate around a location peg on the same corner of the viewing screen.
It would not then be possible to locate the X-ray correctly onto the viewing screen. ( square peg into a round hole does not go ! )

To be viewed correctly the X-ray must be placed onto a viewing screen. If the X-ray film is produced with a small `cut-out` in one corner this could then locate around a location peg on the same corner of the viewing screen.
It would not then be possible to locate the X-ray correctly onto the viewing screen. ( square peg into a round hole does not go ! )