map for this web site is here.

The book Illustrating Time's Shadow available here, please download the new

Anyone who bought Illustrating Shadows or Illustrating More Shadows may
download the replacement book Illustrating Times Shadow, just use your userid
and password you got back then.

If you have lost your userid and password to download Illustrating Time's
Shadow then email me using the email you used when you got your book
originally, and I will send you a new userid and password within 24 hours, but
often much more quickly.

The appendices may refer to chapters that are incorrect, this is because the
appendices were designed to support several books.

January 31, 2016

Illustrating Time’s Shadow appendices EOT Tables corrected for
minor error around end of February and start of March. Also master
spreadsheet, and the separate EOT booklets.

January 7, 2014 Illustrating Time’s Shadow chapter 6 page 39  ~ added a
trailing paren }

December 22, 2013 Illustrating Time’s Shadow page 103 ~ a sentence says
for longitude corrected dials, calendar lines would be skewed,
incorrect so remove it.

April 10, 2013
Illustrating Time’s Shadow appendices
clearer sentence

Page 125 appendix 7, “and for local noon on the vertical decliner,
which is some unknown hour on the surrogate horizontal dial, remember
that SD is where the surrogate dial’s noon lies, thus:-“

April 4, 2013
Illustrating Time’s Shadow appendices and the main book
minor typo
Page 141 in appendix 8
also page 150, 222, 394 of Illustrating Time’s Shadow
formula A8.21 , the formula is missing a trailing “)”

March 14, 2013
Illustrating Time’s Shadow
Chapter 14
minor typo
Page 122 in chapter 14
The hours shown were 10 am to 2pm, the below is correct.

Feb 15, 2013
Illustrating Time’s Shadow
Page 287 in chapter 25, second paragraph
The sentence “Hour lines are of course mean hour lines. “ is better
phrased as “Hour lines match a clock when the longitude correction and
the equation of time are factored in.“

Feb 9, 2013
Illustrating Time’s Shadow
Minor typo
Page 280 in chapter 24
The text says Winter Solstice twice, it should have the winter solstice
at the top and the bottom should read Summer  solstice        

Feb 9, 2013
Illustrating Time’s Shadow
Minor typo
Page 266 in chapter 23
The text says Aa, Ab, Ac and it should be Ca, Cb, and Cc        

Feb 9, 2013
Illustrating Time’s Shadow
Minor typo
Page 218 in chapter 20
The picture showing the SD as an angle from the horizontal should
actually show “90–SD” and not “SD.”

Dec 10, 2012
Illustrating Time’s Shadow
Page 137 in chapter 16
Better picture
The following is a summary of corrections to the previous print run,
which was the last spiral bound volume.
In case you have a much earlier edition, you can see updates and
clarifications in a file called:-


And you should also consider the more recent updates mentioned
above also. The best thing is to re download the book here which is
always up to date:-      

Illustrating Time's Shadow
Updates and Corrections
Jan 7, 2014
Master spreeadsheet
Feb 2, 2016
DeltaCAD macro updates
Nov 26, 2013
FreeCAD python programs
Mar 29, 2013
Apr 2, 2013
Powerdraw macros
Dec 26, 2013
ProgeCAD LISP scripts
Feb 2, 2013
Jan 1, 2011
Illustrating Time’s Shadow
spiral bound
trivial clarification
Chapter 9, page 74
The paragraph on the bottom right of page 74....
The following is a summary of corrections to the October 2012 print run,
which was the first perfect-bind volume.

All updates are included in the online download options.
The update summaries below   are available here
in a file called:-                            updatesAndLatestCorrections.pdf
with full details.