This is a PDF file that has three sections of the book ILLUSTRATING SHADOWS.
One part is the two chapters on CAD, using CAD to create VRML, and using CAD to actually design hour angles
This consists of extracts from the main book, ILLUSTRATING SHADOWS for a detailed table of contents or here for a chapter index.
This file is about 600K.
CLICK HERE TO DOWNLOAD
updated: more CAD examples along with TurboCAD commands showing the wine glass as a sun dial.
updated: astronomical EOT formula usable in a spreadsheet is added and examples of its use in several centuries.
updated: added extracts from the new chapter 20, very extensive CAD stuff..