In message ,
Alastair writes
Seriously, can anyone confirm that this is correct? "... and Brooks’s
ice frigid air effect" where Brooks is C.E.P Brooks F.R.Met.Soc.

I go by how I would pronounce it, and on that basis would write Brooks'
rather than Brooks's. ("Ice frigid air" also looks rather strange.)
--
John Hall
"One can certainly imagine the myriad of uses
for a hand-held iguana maker"
Hobbes (the tiger, not the philosopher!)