Gah, I thought that link would have worked. Not to worry, as you say it can be seen in the youtube video at that time mark.

Numbers on graphs are always preferable. I can understand it not being included in this case as the important information for identification is the horizontal axis (the wave number of the Raman shift), not the vertical axis which only gives intensity of the signal.

Jonny

The path to good scholarship is paved with imagined patterns. - David M Raup