This is a great book for those who attack instrument construction from a more scientific approach. Dr. Hurd applies “introductory physics and technology to instrument making in a manner that can be used and tested by anyone with a knowledge of high school mathematics, a home computer...” Our Sales Manager reviewed this book and verified the equations for accuracy and would be happy to answer any and all technical questions relating to this book?! Just kidding. CD of photos and spreadsheets included. Softcover, 169 pages plus apendices.