The IMU seems to have a great deal (all?) of the proceedings of older ICM conferences online now on the [IMU website](https://www.mathunion.org/icm/proceedings).  The written version of Weyl's address is on page 161 of [Volume 1 of the 1954 proceedings](https://www.mathunion.org/fileadmin/ICM/Proceedings/ICM1954.1/ICM1954.1.ocr.pdf).