On Wed, 27 Sep 2017 17:53:42 +0100, charles wrote:

in years goneby, our second year course in one particular subject began
with words" Since you've all got A-Level Chemistry, I'll start from
there."

Well that's a bit better than the opening words of my A Level
Chemistry. "What ever they taught you at O Level forget it, its
wrong".

--
Cheers
Dave.