I have been following a British historical show (whose name presently escapes me) that reviews how the "chemist's shop" has evolved from the early 1800's until just prior to WW1. The series has 4 1 hour segmnets, and the first three have already been broadcast on TVO. I find that thye have been really well done. Next week thay are highlighting how photography supplies evolved to be involved with the chemist's trade. The other 3 are worth the watch if you get the chance again.