This principle cannot be carried all the way into the bass since the lowest strings would be inconveniently long, so somewhere below middle C the strings are gradually shortened and the diameters of the wires are increased in compensation.
"Italian Harpsichord-Building in the 16th and 17th Centuries"
John D. Shortridge
Capillitium and spores as seen by a magnifying power of 500 diameters.
"The Myxomycetes of the Miami Valley, Ohio"
A. P. Morgan
The hands must be held steady, and the tube must be under good control at all times, so that both ends may be rotated at the same angular velocity, even though they may be of different diameters, and the tube be neither drawn apart nor pushed together unless such a motion is expressly desired, as it sometimes is.
"Laboratory Manual of Glass-Blowing"
Francis C. Frary