How much is a chemistry teacher worth?

For all that we value ourselves, we hardly seem to be featured on either stamps or banknotes — though many famous chemists do. In 1991 I was given this Ethiopian note (no longer legal tender), which was then equivalent to $US 25.

50 from Ethiopian currency.The teacher can be seen more clearly here:

Students looking at their teacher teaching chemistry.Chem13 News readers may be interested in the Canadian connection: the design is clearly based on this photograph which appeared in the National Geographic of April 1965:

Professor teaching chemistry to students.“The first paper in chemistry to be published in an international journal from the Department of Chemistry of Addis Ababa University, AAU, is almost certainly that of L.R.Pittwell.”1,2


  1. L.R. Pittwell, Chemist Analyst 1962, 51, 94.
  2. B.M. Abegaz, Bulletin of the Chemical Society of Ethiopia , 1996, 10(1), pages 57-71;