Discussion on "Optical measuring instruments" at the Western Section of the Institution

MR. ROWBOTHAM (Section President, in the Chair): I am sure we are all very much indebted to Mr. Loewen for his very interesting lecture. Before he started his lecture he told me he might deal with the subject from the theoretical point of view or from the application point of view, and he chose the latter. It is for that reason he has explained such a large range of instruments. I believe that if any member likes to challenge him on the scientific or theoretical side he will do his best to reply satisfactorily.