See also http://www.ccp4.ac.uk/dist/html/npo.html http://www.ccp4.ac.uk/dist/html/npo.html, which I'm surprised to see is still there, and fittingly also has Ph

See also http://www.ccp4.ac.uk/dist/html/npo.html http://www.ccp4.ac.uk/dist/html/npo.html, which I'm surprised to see is still there, and fittingly also has Phil Evan's name on it. Note the production of stereo plots which needed practice looking at in the right way to get the effect.