ILLUSTRATING TIME'S SHADOW ~ the book itself ~ the online version is up to date as are new CDs
etc

abbreviated appendix, formula A8.21a needs a definition added as does the free appendices, see below
chapter 14 page 122 has a trivial typo - the bottom figure had the hours 10am to 2pm in the wrong order.    Jan 18, 2010   

ILLUSTRATING TIME'S SHADOW ~ appendices ~ the online version is up to date as are new CDs

formula A8.21a  was shown as:-

z = atan { sin ( ha ) /  sin( 90–ha–dec )*tan (lat )  }

it should either match appendix 7, and be:-

n =    atan
(             sin(      atan(   sin ( Ø ) * tan (sun hour angle)   )        )               )
               tan ( Ø ) * sin( 90 – d – atan (sin ( Ø ) * tan (sun hour angle) ) )           

or it should keep that formula except, for A8.21a, add a definition that for the formula:-

z = atan    
(                   sin(ha)                                  )       where ha=hour line angle of a surrogate horizontal dial             
               sin( 90 – ha – dec ) * tan ( lat )                               
                                                                                                     
the benefit of keeping that formula and adding the definition is that it shows the v-dec derivation

10/20/09        Please download this chapter 16 for book 3, it is much improved on inclined decliners, no corrections, but
       reworded, better pictorials, and better sequence. NOTE: The online version is up to date, as are new CDs etc.
10/20/09        Please download this chapter 18 for book 3, it is much improved on vertical decliners, no corrections, but
       reworded, better pictorials, and better sequence.  NOTE: The online version is up to date, as are new CDs etc.
                                                                                                    
 


ILLUSTRATING SHADOWS

THIRD EDITION

There are some updates, see below  click here for updates themselves , and general update notes also  

11/18/06          SUNRISE AND SUNSET FORMULA:
hsr = arccos( tan(lat) * tan(decl)  )
The formula was correct, the note said from noon but it is as the formula says, hour angle.

11/18/06         THE 2 SINE WAVE EOT FORMULA IS BETTER SHOWN AS   
eot =  7.36*Sin(2*3.1416*(doy-4.21)/365) + 9.92*Sin(4*3.1416*(doy+9.9)/365)   

11/1/06            There are some notes on altitude and azimuth dials not being latitude portable. The following note is more accurate.  "Hour angle dials
use the hour angle around the style and can easily be latitude corrected by tilting. Italian and Babylonian hours are not corrected when
a dial is tilted because they depend on the Earth's curvature [which causes sunset/rise] at a specific latitude. Azimuth and altitude
dials may be ported across latitudes but rigid polar alignment must be retained."

11/26/06          Pages 168, 170 of chapter 10 and page 258 of appendix 8 have the formula for hour lines for inclined decliners, the angle produced is
from the vertical, the notes say noon. Corrected in the downloadable files for book 2, the
download page is here and needs a
userid/password to actually download.

4/11/07             Chapter 8, Figure 8.5 in Illustrating Shadows, winter and summer solstice names were reversed.

12/31/07           Page 175 has spurious text "INCLINES" and "RECLINES" due to a Microsoft Word bug.

3/16/08            Pages 115, 156 typo in hh.h and mm for DL, also appendix pages 250-270 now DL hh.hh are 2 significant digits.

11/26/08         The second page of magnetic declinations has EAST and WEST switched. Download it from book 3 appendices now.                   

If the print date of your book is later than the above dates, then your book has the changes incorporated.

ILLUSTRATING MORE SHADOWS updates

12/31/07            Page 89 has the words "winter solstice" for both the lower and upper curves, as this is a vertical dial, the lower curve should say
"summer solstice".
2/3/08                 Page 217 has a C program with a line:-  printf ("Uncorrected hour line angles \n" ) ;
the line should read:-                               printf ("Corrected hour line angles \n" ) ;

11/26/08         The second page of magnetic declinations has EAST and WEST switched. Download it from book 3 appendices now.    

If the print date of your book is later than the above dates, then your book has the changes incorporated.
July 2010
ALL BOOKS ARE ONLINE AND UPDATED IN:  The book 3 appendices are free, and book 3 itself is yours to download if you
email for the userid/password
Illustrating Time's Shadow
ISBN 0-9765286-8-1  plus  0-9765286-9-X
Lib Cong 2005900674  plus  2006930654

Merges Illustrating Shadows and Illustrating More Shadows, deletes duplicated material, and techniques that are complex and
replaced by easier methods, adds new material.

Hands on, empirical, geometric, trigonometric, CAD,  and spreadsheet dial design for small dials plus garden dials using common masonry supplies, clay, and glass, with emphasis
on many calendar line techniques, and inclined decliners, while providing details on the use of DeltaCAD programming including the animation of many sheets as parameters vary.  
Case studies abound with associated problems solved, and cover the infamous inclined decliner, as well as all the other kinds of outdoor dials.  The printed book comes with a CD of
booklets, spreadsheets, VRML/WRL files, templates, etc with the printed book. The CD has all books and booklets and programs along with source code.  
You can get the printed book
and CD, just the CD, or an online download here.