He first defined the geography of Tsaidam, and mapped the hydrography of that remarkable region, from which emanate the great rivers of China, Siam and Burma.
Although the genuineness of these writings has been impugned on various occasions by different scholars, there seems to be no reason for assuming that they did not emanate from the saint's pen.
In the next place, it seeks to account for the general laws of the world, for the universal forms of existence, as ideas which emanate from the Deity.
Sanson have their origin in the apocryphal Memoires pour servir a l'histoire de la Revolution Francaise par Sanson (2 vols., 1829; another ed., 1831), of which a few pages of introduction emanate from Balzac, and some other matter from Lheritier de l'Ain.
They emanate from scientific writers who rightly try to rise from science to metaphysics, but, as Bacon says, build a universal philosophy on a few experiments.
Of these official acts, however, it is possible to distinguish two categories: those emanating directly from the heads of departments are generally called Acts of the Holy See (and in this sense the Holy See is equivalent to the Curia); those which emanate direct from the pope are called Pontifical Acts.
However, the i spirit of that great legal classic seems to have in a measure dwelt with and inspired the inferior men who were recasting his work; the Institutes is better both in Latinity and in substance than we should have expected from the condition of Latin letters at that epoch, better than the other laws which emanate from Justinian.
Starting, then, from this fundamental distinction between judgments of existence and judgments of non-existence, we may hope to steer our way between two extreme views which emanate from two important thinkers, each of whom has produced a flourishing school of psychological logic.
The simplest case of a caustic curve is when the reflecting surface is a circle, and the luminous rays emanate from a point on the circumference.
For a circle, when the rays emanate from any point, the secondary caustic is a limacon, and hence the primary caustic is the evolute of this curve.
When the refracting curve is a circle and the rays emanate from any point, the locus of the secondary caustic is a Cartesian oval, and the evolute of this curve is the required diacaustic. These curves appear to have been first discussed by Gergonne.