I have a few lines left underneath your Chartres pictures. I wonder if you'd like to have something written under them that might enlighten the reader, if it fits the rest of the book.
Of course I have written the text about the coloring already underneath.
Are the measurements for inst. made on the spot? anything else?
I haven't realy had the time to browse your homepage yet, as it has a huge amount of material...
or maybe there is a related document in your files that I should have a glance at?
Sincerely Sven Christiansen
The measurements for the Chartres Cathedral were on the sheet when it was given to me by a contemporary architect in Boston who had a copy of the plan.
I just translated the length of each line into music notation based on the frequencies in my Lambdoma reference octave.
The formula is: V = f*w Where V is the velocity of sound through air at ~1320 feet per second at room temperature. F is frequency in Hertz or cycles per second. W is the distance in feet. Therefore when you know the length, divide the length by the velocity and you will have the exact frequency as a result. Then you take the reference octave of Lambdoma frequencies below:
C(256)red, D(288)orange, E(320)orange-yellow, F(352)green, G(384)blue, A(416)aqua, A+(448)indigo, B(480)violet and C(512)red.
I don't remember what I wrote to you about the coloring of the strings aside from the fact that the colorings were all based upon wavelengths of musical harmonics according to Pythagorean color-coding of C(red), D(orange), E(orange yellow), F(green), G(Blue), A(Indigo) and B(violet-purple).
Use what you wish of this. I am so pleased that you are citing these pictures in your book.