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• In one of my old triangle geometry files, I have found a cryptographical notice which I made in 2002 while dipping into some old issues of the Proceedings of
Message 1 of 1 , May 5, 2003
In one of my old triangle geometry files, I have
found a cryptographical notice which I made in
2002 while dipping into some old issues of the
"Proceedings of the Edinburgh Math. Society".
copy them, and would be very grateful if you can
provide me further information about these
papers.

Here are the contents of my notice - the numbers
in the beginning of the lines are the volume
numbers:

Edinburgh Proceedings

1 pages 4-128 The triangle
2 pages 2-4 circles
3 pages 77-93 Simson line
5 pages 62-78 d² = R² - 2Rr
5 pages 102-103 Feuerbach tangency
6 pages 2-12 triangle's sides: erecting
squares
6 pages 38-40 Feuerbach circle
6 pages 42-47 pedal triangles
9 pages 36-39 orthic triangle
9 pages 39-48 pedal triangles
9 pages 50-55 pedal line
10 pages 70-82 intimoscribed circles
[If my memory doesn't cheat me, this
were the mixtrilinear incircles?]
11 pages 19-57 Feuerbach circle
12 page 85 pedal triangle
12 pages 118-119 orthocentric triangle
13 pages 26-27 Feuerbach tangency
13 page 28 Brocard
13 pages 37-104 bisectors of triangle
13 pages 166-178 isogonals
14 pages 37-103 symmedians
14 pages 116-120 Simson lines
15 pages 98-118 Fermat points
17 pages 70-99 Third (Tucker) hexagons
18 pages 11-24 isotomcomplement
[Surely with another name]
19 pages 10-22 perspective triangles

With the 19th issue, I have stopped this list.
everything (even not all triangle geometry
articles; there were just too many)!

I have complete references of three papers:

1 pages 4-128 The triangle
is:
J. S. Mackay: The triangle and its six
scribed circles. Proc. Edinburgh Math. Soc.
1 (1883) pages 4-128

14 pages 37-103 symmedians
is:
John Mackay: Symmedians of a Triangle and
their Concomitant Circles, Proc. Edinburgh
Math. Soc. 14 (1896) pages 37-103.

18 pages 11-24 isotomcomplement
is:
J. A. Third: Two geometrical
transformations, Proc. Edinburgh Math. Soc.
18 (1899-1900) pages 11-24.

As I have said, I don't remember more than I had
written up in my notice. Especially, I would be
very interested for copies or summaries of the
following papers (if my numbers are correct,
they must be very short ones):

5 pages 102-103 Feuerbach tangency
6 pages 38-40 Feuerbach circle