Amy Levant Hayden spraying chromatogram with reagent
NIH photographer, name not known
1952
NIH History Office <a rel="nofollow" class="external free" href="https://www.flickr.com/photos/historyatnih/32897938662/in/album-72157680816283366/">https://www.flickr.com/photos/historyatnih/32897938662/in/album-72157680816283366/</a>