Bank note scanner

So, it took a wee minute. It was that word. Olfactory. In Dundee ?

It's not a word that crops up in everyday conversation. What did it mean, especially in Dundee where the patentee lived?

Then, the penny dropped. Olfactory means the sense of smell.

So, someone has invented a machine that sniffs banknotes.

So glad. It makes FirstFoot happy and confirms some prejudices about Dundee and sniffing.