This volume was essentially a record of the contributions which Blaschke and his students had made to this topic, for it was a topic which eh had introduced and developed.
Ang dami ay isang mahalagang tala ng mga kontribusyon na Blaschke at ang kanyang mga mag-aaral ay ginawa upang ang paksang ito, para sa mga ito ay isang paksa na kung saan eh may ipinakilala at binuo.