RalphLambrecht
Subscriber
Mr. Lambrecht, it's on Page 189 in the second edition you have there.
I believe the Page 114 to which Ulophot refers to be in the first edition.
Looking at it myself, I'm inclined to agree with others that the •5 refers to the halfway point between two zones.
Like others, I'm also happy we have the author with us here to answer questions definitively. We're a pretty spoiled bunch here!
Thank you in retrospect and in advance, Mr. Lambrecht!
that's correct elsewhere in the book one finds he attached table, which explains it somewhat, but I agree with the OP that it is not well explained!