That would be the 90 mark on yours. Here’s a pic of mine.
Sorry for the lame picture

Edit :-
Just read the rest of your post.
As I recall from school. You read the lowest part of the dip, but I have to be honest - these 'home' hydrometers aren’t that accurate, and temperature plays a real issue. There will be an operating temperature on the scale somewhere in the 20C - 25C range, mine is only accurate at 20C, there are conversion tables on the net for when you have to measure outside the range. I use an iPhone app to do it as I'm lazy.
Regards
Ian..Statistics: Posted by umpa — Wed Jan 07, 2009 3:39 pm
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