#DISTRIBUTEDBY=Aerosol Refractive Index Archive (www.atm.ox.ac.uk/project/RI/)
#DESCRIPTION=Ground sample collected in Cheney Washington.
#SUBSTANCE=Mt. St. Helens ash May 18 1980 eruption
#SAMPLEFORM=Solid
#TEMPERATURE=
#CONCENTRATION=
#DOI=10.1126/science.211.4484.836
#REFERENCE= E. Patterson, measurement of the imaginary refractive index
##between 300 and 700nm of Mount St. Helens ash, Science, 211, 1981
#CONTACT=
#COMMENT=Digitised from publication graph, absolute accuracy is unknown.
#FORMAT=WAVL K
      0.30244225    0.0073462198
      0.30911220    0.0057806401
      0.31168906    0.0053818701
      0.33094226    0.0043618400
      0.35077896    0.0035055401
      0.40182883    0.0025260199
      0.48924677    0.0020742400
      0.50574418    0.0020142901
      0.58268837    0.0018450500
      0.69697584    0.0016276400
