Pauly-Wissowa, Realencyclopädie der classischen Altertumswissenschaft, 1894ff, is an encyclopedia of classical scholarship. With its supplements it comprises well over a hundred volumes.
Each article was written by a recognized specialist in the relevant field.
The index to Pauly-Wissowa is available on CD-ROM.
... when the precession of the gyroscope is supported and amplified by wrist motion.
It takes a while until one finds the "rolling" point, but the gyro will also b ...